Review Game

Keep track of how many questions your team gets correct.

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Section 4-4Section 4.4 Assessment

A reaction that changes one element into another is called what? A. chemical reaction B. beta radiation C. nuclear reaction D. physical reaction

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Section 4-4Section 4.4 Assessment

Why are radioactive elements rare in nature? A. They do no occur on Earth. B. Most have already decayed to a

stable form.C. They take a long time to form. D. They are too hard to detect.

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Chapter Assessment 1Whose work led to the modern atomic theory? A. Dalton B. Rutherford C. Einstein D. Aristotle

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Chapter Assessment 2

Which particle is not found in the nucleus of an atom? A. neutron B. proton C. gamma ray D. electron

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Chapter Assessment 3

Two isotopes of an unknown element have the same number of: A. protons B. neutrons C. electrons D. both A and C

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Chapter Assessment 4Lithium has an atomic mass of 6.941 and two isotopes, one with 3 neutrons and one with 4 neutrons. Which isotope is more abundant? A. 6Li B. 7Li C. Both isotopes occur equally. D. unable to determine

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Chapter Assessment 5

What happens when an element emits radioactive particles? A. It gains energy.B. It gains neutrons. C. It loses stability. D. It loses energy.

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STP 1

What is the smallest particle of an element that still retains the properties of that element? A. proton B. atom C. electron D. neutron

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STP 2

A B C D

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How many neutrons, protons, and electrons does 124

54Xe have?

A. 124 neutrons, 54 protons, 54 electrons B. 70 neutrons, 54 protons, 54 electrons C. 124 neutrons, 70 protons, 54 electrons D. 70 neutrons, 70 protons, 54 electrons

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STP 3The primary factor in determining an atom's stability is its ratio of neutrons to ____. A. protons B. electronsC. alpha particlesD. isotopes

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STP 4

What is the densest region of an atom? A. electron cloud B. nucleus C. isotopes D. atomic mass

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STP 5

Why are electrons attracted to the cathode in a cathode ray tube? A. The cathode is more stable. B. The cathode has a positive charge. C. The cathode has a negative charge. D. The cathode has no charge.

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STP 5

The nucleus of an atom is: A. Positively charged with low density. B. Negatively charged with low density. C. Positively charged with high density. D. Negatively charged with high density.

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STP 5

Which of the following is NOT part of Dalton’s atomic theory? A. All elements are composed of atoms. B. Atoms are always in motion. C. Atoms that combine do so in whole number ratios. D. Atoms of the same element are alike.

A. AB. BC. CD. D

STP 5Which scientist theorized that the atom contained a nucleus? A. DemocritusB. Thomson. C. Rutherford. D. Dalton.

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STP 5Alpha decay will result in: A. The loss of 2 protonsB. The loss of 2 neutrons. C. The loss of 4amu. D. All of the above.

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STP 5Beta decay is: A. The loss of a protonB. The loss of a neutron. C. The loss of mass. D. The loss of an electron.