Flash Cards

Changing number of +protons…..

Changes the element

Who did Gold Foil Experiment?

Rutherford

Plum Pudding Model

Thomson

Atom is made of mostly of…

Empty space…..Rutherford

Metals ___________ -e

lose

Rutherford: nucleus is…

Small & +positive charge

Discovered -e

Thomson

Solid ball model

Dalton

Current accepted atomic model

Electron cloud

Atomic model has scattered negative charges spread throughout

Thomson

Non-metals ________ -e

gain

Change number of neutrons…

Creates isotopes

What will Ne react with?

None – Noble gas

Most reactive metal family

Alkali Metals #1

Period tells you…

Number of energy shells

Most reactive non-metal Family

Halogens

Planetary model

Bohr

Number of electrons on first three shells…

2, 8, 18, 32

+p: 21n: 23 Atomic Mass?-e: 21

44

+p: 21n: 23 Atomic Number?-e: 21

21

Hot to the touch during reaction

exothermic

H2O → H2 + 02

Type of reaction?

Decomposition

Most reactive non-metal group

Halogens

Ca + P → _________

Ca2+ + P3- → Ca3P2

?

Name of column #2

Alkaline Earth Metals

Bond that shares valance electrons

Covalent

Metal + Metal

Metallic Bond

Charged Particle

Ion

Number of –e in outer shell

Valance electrons

Reaction feels cold to the touch

Endothermic

Heat always flows from ____ to ______.

Hot areas to cold areas

Most reactive metal element

Fr

Used CRT(cathode ray tube)

Thomson

Model which has energy levels

Bohr

Cl-38+p: ____ n: ____ -e: ____

172117

Metal + Non-metal

Ionic Bond

K + N → _________

K1+ + N3- → K3N

Thomson

Cu

Average of isotopes

63.55

29

Why?

pH 8-14

Base

Acid + Base =

Water & salt

Dalton – solid sphere

Who’s model?

pH 0-6

Acid

Neutral pH

7

Strong Acid pH

0-1

Weak Base pH

8-9

Reactant side of chemical equation

Left _____ → ________

Strongest base?pH 1 pH 5 pH 8 pH

13

pH 13

Zn + 2HCl - ZnCl2 + H2

Type of reaction?

Single Replacement

Why do cows wear bells?

Because their horns don’t work.

2H2O2 → 2H2O + O2

Type of reaction?

Decomposition

Electrically Neutral…..

Same number + and -

Non-Metal + Non-metal

Covalent Bond

Oxidation Charge Number for Fe (IV)

4+

What makes an atom stable?

Full outside shell

The amount of energy that is put into a machine never equals the amount out of the machine. Why?

Loss of energy to friction.

A bird flies 25-m in 4 seconds. What is its velocity?

v = d

t=

25

4= 6.25 m/s

A car pulls away from a stop sign to a speed of 12 m/s in 3 seconds. What is its acceleration?

a = vf - vi

t=

12-0

3= 4 m/s/s

How much force is required to accelerate a 9-kg cart at 6-m/s/s ?

F = m a = (9)·(6) = 54 N

For every action force there is an equal and opposite reaction force. Which law is this?

Newton’s Third Law of Motion

What property makes a moving object resist changing its speed?

Inertia

The amount of matter that is in a given object’s volume is called its______________.

Density

The water level said 10 mL before the rock was added. After the graduated cylinder read 15 mL. What is the volume of the rock?

15-10= 5 mL

If the rock has a mass of 35 g, what is the density of the rock?

D = m / VD = 35 / 5D = 7 g/mL

How many electrons does Nitrogen-15 need in order to be stable?

3

How many electrons does Hydrogen need in order to be stable?

1

What type of chemical bond does a water molecule have?

H2O

Covalent

A dog chases a car running at 8 m/s for 4 seconds. How will the dog travel during this time?

v = d

t

8 = d

4

8 = d 4 ·

d = 32 32 meters

What type of chemical bond does a table salt have?

NaCl

Ionic

Kim carried an 11-N box up a flight of stairs 6 meters high. How much work did she do?

W = F ·d

W = 6 11·

W = 66 J

How much current will flow through a 2-Ω resistor when it is connected to a 24-V battery?

V = I · R

24 = 2 I

I = 24/2 = 12 Amps

How much power does a 100V motor have if it uses 20 amps?

P = I · V

P = 100 20 ·

P = 2 000 Watts

What type of circuit is this?

Parallel

What type of circuit is this?

Series

What type of circuit is this?

Series

What type of circuit is this?

Parallel

What kind of object is the best to use as a frame of reference?

Object attached to the ground.(ex: sign, tree, fence)

Put the atomic model scientist in historical order.

Dalton Thomson Rutherford Bohr Schrödinger

Bohr Dalton Rutherford Thomson Schrödinger

The part of the atom with the smallest mass.

Electron

The number of protons remain the same, but neutrons are added. This creates…

isotopes

99% of an atom’s mass exists in this location.

nucleus

Our Moon is 1/6th the size of the Earth; so an astronaut’s _____ will be less on the Moon.

Weight

An astronaut traveling through space is weightless, but her ____ is still the same.

Mass

A ball is dropped from a roof and it will begin to accelerate at _______.

9.8 m/s/s = “g”

How fast is an object going to be traveling after 2 seconds from being dropped?

2 x g = 2 x 9.8 = 19.6 m/s

The charge on a proton is…

Positive

Which direction will the heat travel through these objects?

Highest to lowest:A→B and C→B

A65°C

B23°C

C48°C

How can you create C-14 from C-12?

Add two neutrons (isotopes)

The state of matter in which particles are vibrating in place.

Solid

Where are the largest radius atoms located on the periodic table?

Lower left corner (Fr)

How many protons does Phosphorous have?

15

The atomic number for Ni

28

The atomic mass of Cacium

40

S has how many neutrons?

35 – 16 = 19

16

35

A plane travels 400 km in 2 hrs. What is the plane's speed?

v = d t

v = 400 2 = 200 km/hr

What will be the acceleration of a 20 kg cart after a 140 N force is applied?

F = m · a 140 = 20 · a

140 = 20 · a 20 20

140 = a 20

7 m/s/s = a

Once an object is in motion it will stay in that motion unless a a net force acts on it.

Newton’s 1st Law of motion

For every action there is an equal and opposite reaction.

Newton’s 3rd Law of Motion

Bohr’s model of Boron

Boron has 5 p+ and so 5 e-

What is the oxidation number of Carbonate?

CO3 is a polyatomic ion and has a (2-) charge.

What is the valence number of Mg ?

2

How many electron shells does Chlorine have?

3

It will take 500J of work to move a tractor. If this is done in 25 seconds, how much power is used?

P = Wt

P = 50025 = 20 Watts

Oxygen will react more with…Magnesium or Potassium ?

K…because it is closer to F corner.