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Greek Philosophers

Dalton’s Atomic Theory

How atoms differ

Radioactivity

Types of radiation

The atom

Subatomic particles

A 1

Said that matter is made of atoms which move through empty space

A 2

Stated that empty space cannot exist and that matter is made up of earth fire, and water

A 3

Marked the beginning of the modern atomic theory

A 4

Dalton’s idea’s were most like who??

B 1

Atoms are composed of extremely small particles called?

B 2

Atoms of a given element had identical what?

B 3

Atoms do this when they combine to make compounds

B 4

In a chemical reaction, atoms do this.

C 1

The smallest part particle of an element that retains the properties of the element.

C 2

Discovered by JJ Thomson, this atomic particle was foundusing a cathode ray tube

C 3

The model Thomson composed that states that the atom is a uniform, positively charged sphere containing electrons.

C 4

The scientist and name of the experiment who used the Plum Pudding model to determine properties of the nucleus, including charge, relative size, and density

D 1

Carries a positive charge and is located in the nucleus of the atom

D 2

Discovered by James Chadwick, contains a neutral charge, is located in the nucleus, is about the same mass as a proton

D 3

Carries a negative charge, located surrounding the nucleus, and has a mass much smaller than a proton and neutron

D 4

Most of the atoms’ mass

E 1

The number of protons in an atom is also the elements identity

E 2

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

E 3

The atomic number plus the number of neutrons

E 4

Defined as one twelfth the mass of a carbon-12 atom. (An easier wayto express the mass of an atom

F 1

The rays and particles emitted by radioactive material

F 2

A reaction that involves a change in an atom’s nucleus.

F 3

Unstable nuclei lose energy by emitting radiation in this spontaneous process.

F 4

Substances that spontaneously emit radiation is called this process

G 1

Contains two protons and two neutronsand is equivalent to a Helium-4 nucleus

G 2

Consists of a fast moving electron

G 3

High energy radiation that possess no mass usually accompanies alpha and beta radiation

G 4

The quantities that are conserved when balancing a nuclear reaction

A 1

Democritus

A 2

Aristotle

A 3

Dalton

A 4

Democritus

B 1

ATOMS

B 2

Size, Shape, and Mass

B 3

Combine in simple whole number ratios

B 4

Separate, combine and rearrange

C 1

ATOM

C 2

Electron

C 3

Plum Pudding model

C 4

Rutherford – Gold Foil Experiment

D 1

PROTON

D 2

Neutron

D 3

Electron

D 4

Nucleus

E 1

Atomic Number

E 2

Isotope

E 3

Mass Number

E 4

amu

F 1

Radiation

F 2

Nuclear reaction

F 3

Radioactive decay

F 4

Radioactivity

G 1

Alpha particle

G 2

Beta particle

G 3

Gamma ray

G 4

Mass number and atomic number