Atomic History	Atomic Structure	Isotopes, Ions, and Such	Radioactivity	Electrons
10	10	10	10	10
20	20	20	20	20
30	30	30	30	30
40	40	40	40	40
50	50	50	50	50
Final Question

Scientist whose alpha particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge.

Scientist whose alpha particle scattering experiment led him to conclude that the nucleus of an atom contains a dense center of positive charge.

Rutherford

The first scientist to show that atoms emit negative particles using his cathode ray experiment.

Thomson

First to use the term atom.

Democritus

Identified the charge on the electron using the Oil Drop Experiment

Milikan

Proposed the Law of Conservation of Matter.

Dalton

What are the three subatomic particles?

protons, neutrons and electrons

The sum of protons and neutrons is the

atomic mass

The number of protons indicates the identity of the element and the

atomic number

Atom with the same number of protons but different number of neutrons

isotope

Atom that has gained or lost electrons

ion

How many electrons are in the outermost energy level of an electrically neutral atom of nitrogen

Explain the difference between C-14 and C-12?

Both have 6 protons; C-12 has 6 neutrons and C-14 has 8 neutrons.

The identity of an element depends on its

atomic number

Electrons located in the outermost energy level

valence electrons

How many electrons can be in a 4f sublevel

The radioactive particle with the most mass.

alpha particle

When a gamma ray is given off during radioactive decay as a

photon

The type of radiation that is most penetrating

gamma

When Thorium-234 goes through alpha decay what is produced?

Rn-230

When Thorium-234 goes through beta decay and gamma decay what is produced?

Pa-234 and a photon

What is the electron configuration for He

1s2

Ions of an element contain a different number of

electrons

What is the Noble Gas configuration of Fe

[Ar] 4s2 3d6

High energy photon

gamma ray

When an electron jumps from n=5 to n=2 what color light is emitted?

blue light

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