Chem Test 1

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created 8 years ago by MaggieHaynes
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Grade levels:
College: First year
Subjects:
chemistry
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1

Dalton

Atomic Theory
Model: small, solid sphere

2

Thompson

Electron
Plum Pudding Model
positive core with embedded electrons

3

Rutherford

Gold Foil Experiment/Proton
Model: Positive nucleus with electron cloud
NO neutron

4

Chadwick

Neutron
Model: contains all 3 subatomic particles

5

Bohr

electrons have specific path around nucleus
Model: nucleus and electron orbitals

6

Mid 1950s Model of the Atom

Electron Could Model
electrons outside the nucleus, move in area(cloud), hard to pinpoint exact location
Model: fuzzy with boundary

7

Giga-

1 billion

8

Mega-

1 million

9

Kilo-

1 thousand

10

Deci-

1 tenth

11

Centi-

1 hundreth

12

Milli-

1 millionth

13

Micro-

1 billionth

14

Atomic size ___________from top to bottom.
Why?

increases, because you're adding an additional energy level

15

Atomic size _________from left to right.
Why?

decreases, because when you add another proton it increases the positive pull on the outer electron pulling it closer to the nucleus

16

Ionization Energy__________from top to bottom.
Why?

decreases, because the outer electron is father away from the nucleus so it has less of a pull

17

Ionization Energy_________from left to right.
Why?

increases, because there is a greater positive charge in the nucleus, so it has a tighter hold on the electrons.

18

Macroscopic

observable with naked eye