Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the...

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Tro IC.3 1. -1, +1, +1 2. -1, +1, -1 3. -1, 0, +1 4. -1, +1, 0 5. +1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Transcript of Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the...

Page 1: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. -1, +1, +12. -1, +1, -13. -1, 0, +1 4. -1, +1, 05. +1, +1, 0

4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Page 2: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. -1, +1, +12. -1, +1, -13. -1, 0, +1 4. -1, +1, 05. +1, +1, 0

4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Page 3: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Democritus2. J. J. Thomson3. John Dalton 4. Lord Kelvin5. Ernest Rutherford

4.2 Which scientist discovered the electron?

Page 4: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Democritus2. J. J. Thomson3. John Dalton 4. Lord Kelvin5. Ernest Rutherford

4.2 Which scientist discovered the electron?

Page 5: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Electron2. Neutron3. Proton 4. Two of the above5. All of the above

4.3 Which of the following subatomic particles has the least mass?

Page 6: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Electron2. Neutron3. Proton 4. Two of the above5. All of the above

4.3 Which of the following subatomic particles has the least mass?

Page 7: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Electron 2. Neutron3. Proton4. Two of the above5. All of the above

4.4 What subatomic particle(s) is/are found in the nucleus?

Page 8: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Electron 2. Neutron3. Proton4. Two of the above5. All of the above

4.4 What subatomic particle(s) is/are found in the nucleus?

Page 9: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Mercury2. Polonium3. Platinum4. Tungsten5. Lead

4.5 Which element has the chemical symbol Pb?

Page 10: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Mercury2. Polonium3. Platinum4. Tungsten5. Lead

4.5 Which element has the chemical symbol Pb?

Page 11: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Po 2. P 3. Pt4. Pb5. K

4.6 What is the chemical symbol for potassium?

Page 12: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Po 2. P 3. Pt4. Pb5. K

4.6 What is the chemical symbol for potassium?

Page 13: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 47 2. 60 3. 94 4. 1085. 154

4.7 How many protons are in one silver atom?

Page 14: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 47 2. 60 3. 94 4. 1085. 154

4.7 How many protons are in one silver atom?

Page 15: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Aluminum2. Silicon3. Tin4. Phosphorus5. Iodine

4.8 Which of the following elements is a metalloid?

Page 16: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Aluminum2. Silicon3. Tin4. Phosphorus5. Iodine

4.8 Which of the following elements is a metalloid?

Page 17: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Arsenic2. Bismuth3. Carbon4. Iodine5. Gallium

4.9 Which of the following elements is a metalloid?

Page 18: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Arsenic2. Bismuth3. Carbon4. Iodine5. Gallium

4.9 Which of the following elements is a metalloid?

Page 19: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Halogens2. Noble gases3. Alkaline earth metals4. Alkali metals5. Pnictogens

4.10 Strontium is in the family of:

Page 20: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Halogens2. Noble gases3. Alkaline earth metals4. Alkali metals5. Pnictogens

4.10 Strontium is in the family of:

Page 21: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Halogens2. Noble gases3. Alkaline earth metals4. Alkali metals5. Pnictogens

4.11 Chlorine is in the family of:

Page 22: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Halogens2. Noble gases3. Alkaline earth metals4. Alkali metals5. Pnictogens

4.11 Chlorine is in the family of:

Page 23: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Proton number 2. Mass number3. Atomic number4. Isotope number5. Neutron number

4.12 The total number of neutrons and protons in a given nucleus is referred to as the:

Page 24: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Proton number 2. Mass number3. Atomic number4. Isotope number5. Neutron number

4.12 The total number of neutrons and protons in a given nucleus is referred to as the:

Page 25: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 352. 363. 46 4. 70 5. 80

4.13 How many electrons are in the bromide ion, 81Br1–?

Page 26: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 352. 363. 46 4. 70 5. 80

4.13 How many electrons are in the bromide ion, 81Br1–?

Page 27: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 23, 26, 30 2. 26, 26, 30 3. 26, 26, 56 4. 26, 26, 26 5. 29, 26, 30

4.14 How many electrons, protons, and neutrons respectively are in the iron(III) ion, 56Fe3+ ?

Page 28: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

4.14 How many electrons, protons, and neutrons respectively are in the iron(III) ion, 56Fe3+ ?

1. 23, 26, 30 2. 26, 26, 30 3. 26, 26, 56 4. 26, 26, 26 5. 29, 26, 30

Page 29: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Si2+

2. Si 3. Mg2+

4. Ne5. Ne2–

4.15 What is the symbol for an ion having 12 protons and 10 electrons?

Page 30: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

4.15 What is the symbol for an ion having 12 protons and 10 electrons?

1. Si2+

2. Si 3. Mg2+

4. Ne5. Ne2–

Page 31: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

4.16 What is the symbol for an ion having 15 protons and 18 electrons?

1. Ph3–

2. Ar 3. P3+

4. Cl1–

5. P3–

Page 32: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

4.16 What is the symbol for an ion having 15 protons and 18 electrons?

1. Ph3–

2. Ar 3. P3+

4. Cl1–

5. P3–

Page 33: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 452. 423. 48 4. 24 5. 18

4.17 How many electrons are in one scandium ion, 45Sc3+?

Page 34: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 452. 423. 48 4. 24 5. 18

4.17 How many electrons are in one scandium ion, 45Sc3+?

Page 35: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

4.18 Which atom has the same number of protons as 59Ni?

1. 59Fe2. 58Ni 3. 59Co 4. 141Pr5. 102Rh

Page 36: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

4.18 Which atom has the same number of protons as 59Ni?

1. 59Fe2. 58Ni 3. 59Co 4. 141Pr5. 102Rh

Page 37: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 19 protons and 19 electrons2. 19 protons and 0 electrons 3. 9 protons and 10 electrons 4. 19 protons and 19 neutrons5. 9 protons and 10 neutrons

4.19 The nucleus of a fluorine-19 atom contains:

Page 38: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 19 protons and 19 electrons2. 19 protons and 0 electrons 3. 9 protons and 10 electrons 4. 19 protons and 19 neutrons5. 9 protons and 10 neutrons

4.19 The nucleus of a fluorine-19 atom contains:

Page 39: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 9F

2. 9F

3. 10F

4. 19F

5. 19F

4.20 A fluorine-19 atom is symbolized as:

10

10

9

9

10

Page 40: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 9F

2. 9F

3. 10F

4. 19F

5. 19F

4.20 A fluorine-19 atom is symbolized as:

10

10

9

9

10

Page 41: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 02. 1–3. 1+4. 2–5. 2+

4.21 What is the charge of a halide ion?

Page 42: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 02. 1–3. 1+4. 2–5. 2+

4.21 What is the charge of a halide ion?

Page 43: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 27Al3+

2. 27Al 3. 14N3–

4. 24Mg2+

5. 20Ne

4.22 Which of the following species has 10 electrons and 14 neutrons?

Page 44: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 27Al3+

2. 27Al 3. 14N3–

4. 24Mg2+

5. 20Ne

4.22 Which of the following species has 10 electrons and 14 neutrons?

Page 45: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 02. 1–3. 1+ 4. 2–5. 2+

4.23 What is the charge of an oxygen atom?

Page 46: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 02. 1–3. 1+ 4. 2–5. 2+

4.23 What is the charge of an oxygen atom?

Page 47: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. The same number of protons, but different numbers of neutrons

2. The same number of protons and neutrons 3. The same chemical symbol 4. The same number of electrons and neutrons5. Two of the above

4.24 Isotopes have:

Page 48: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. The same number of protons, but different numbers of neutrons

2. The same number of protons and neutrons 3. The same chemical symbol 4. The same number of electrons and neutrons5. Two of the above

4.24 Isotopes have:

Page 49: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

4.25 Which of the following elements has the most similar reaction with water as potassium?

1. Ca2. Ar 3. Fe 4. Na 5. C

Page 50: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

4.25 Which of the following elements has the most similar reaction with water as potassium?

1. Ca2. Ar 3. Fe 4. Na 5. C

Page 51: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 12.00 amu2. 12.01 amu3. 13.00 amu4. 14.00 amu5. 25.00 amu

4.26 Carbon has three naturally occurring isotopes: C-12 with mass 12.000 amu and a natural abundance of 98.89%, C-13 with mass 13.004 amu and a natural abundance of 1.110%, and C-14 which is negligibly small. Calculate the atomic mass of carbon.

Page 52: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 12.00 amu2. 12.01 amu3. 13.00 amu4. 14.00 amu5. 25.00 amu

4.26 Carbon has three naturally occurring isotopes: C-12 with mass 12.000 amu and a natural abundance of 98.89%, C-13 with mass 13.004 amu and a natural abundance of 1.110%, and C-14 which is negligibly small. Calculate the atomic mass of carbon.

Page 53: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 299.5 amu2. 299.8 amu3. 300.3 amu4. 300.6 amu5. 301.1 amu

4.27 A hypothetical element, Hy, has three isotopes, Hy-299, Hy-300, and Hy-301, which have the following natural abundance: 5.00 % (Hy-299), 65.00 % (Hy-300), and 30.00 % (Hy-301). The atomic masses or the isotopes are 299.0 amu, 300.0 amu, and 301.0 amu, respectively. Calculate the atomic mass of Hy.

Page 54: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. 299.5 amu2. 299.8 amu3. 300.3 amu4. 300.6 amu5. 301.1 amu

4.27 A hypothetical element, Hy, has three isotopes, Hy-299, Hy-300, and Hy-301, which have the following natural abundance: 5.00 % (Hy-299), 65.00 % (Hy-300), and 30.00 % (Hy-301). The atomic masses or the isotopes are 299.0 amu, 300.0 amu, and 301.0 amu, respectively. Calculate the atomic mass of Hy.

Page 55: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Solid at room temperature2. Malleable3. Ductile4. Located toward the left side of the periodic table5. All of the above

4.28 Which of the following is characteristic of metals?

Page 56: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Solid at room temperature2. Malleable3. Ductile4. Located toward the left side of the periodic table5. All of the above

4.28 Which of the following is characteristic of metals?

Page 57: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Robert Millikan 2. J. J. Thomson 3. John Dalton 4. Lord Kelvin5. Ernest Rutherford

4.29 Which scientist discovered the nucleus?

Page 58: Tro IC.3 1.-1, +1, +1 2.-1, +1, -1 3.-1, 0, +1 4.-1, +1, 0 5.+1, +1, 0 4.1 What is the charge on the electron, the proton, and the neutron, respectively?

Tro IC.3

1. Robert Millikan 2. J. J. Thomson 3. John Dalton 4. Lord Kelvin5. Ernest Rutherford

4.29 Which scientist discovered the nucleus?