The Atom Review

Question 1

Dalton’s Atomic Theory

Answer 1

Same element = identical
Different element = different
Atoms are not created nor destroyed
Combined atoms = compounds
Atoms can be combined, rearranged, and separated

Question 2

Rutherford’s Experiment

Answer 2

In his gold foil experiment, he found that tiny particles were bouncing off of the gold foil. He also found that most of the atom was empty space since electrons and protons were extremely small.

Question 3

Atom

Answer 3

basic unit of matter

Question 4

Isotope Name

Answer 4

Name of element and mass

Question 5

Nuclear Notation

Answer 5

element abbreviation, mass number ^^^, atomic number vvv

Question 6

Average Atomic Mass

Answer 6

average mass given relative abundance of an element

Question 7

Alpha Decay

Answer 7

Helium, -4 mass, -2 protons

Question 8

Beta Decay

Answer 8

electron, +1 proton, same mass

Question 9

Positron Emission

Answer 9

Positron, -1 proton, same mass

Question 10

Electron Capture

Answer 10

adds electron, -1 proton, same mass

Question 11

Half-life

Answer 11

amount of time for 1/2 of radioactive isotope to decay

Question 12

Fission vs. Fusion

Answer 12

fission = nucleus splits with energy released
fusion = nuclei combines with energy released