Chemistry Atomic Unit Test

Front 1

Democratis's Atomic Model/ Theories

Back 1

-atom is smallest unit of a substance that cannot be split

-atoms are solid, homo, indivisible

-different groupings result in different types of matter

Front 2

Dalton's Atomic Model/Theories

Back 2

-all matter is composed of atoms

-atoms cannot be created, divided or destroyed

-law of conservation of mass

Front 3

Thomson's Atomic Model/Theories

Back 3

-cathode ray tube experiment

Front 4

Rutherford's Atomic Model/Theories

Back 4

-discovered dense, positively charged nucleus using gold foil experiment

-work led to discovery of 3 types of radiation, alpha (+), beta (-) and gamma

Front 5

Bohr's Atomic Model/ Theories

Back 5

-electrons orbit in energy levels

Front 6

Chadwick's Atomic Model/ Theories

Back 6

-discovered neutrons

-same mass as protons ^

Front 7

Schrodinger's Wave Mechanical Model

Back 7

1) Electrons (e-) are housed in orbitals

2) E- randomly jump around in their orbitals

3) Orbitals are assigned by energy levels

Front 8

Energy given off in bright line spectrum= . . .

Back 8

Photons of energy, dependent on energy levels

Front 9

What is an isotope?

Back 9

Different versions of the same element, different mass due to different # of neutrons

Example: C-12 and C-14

Front 10

How do atoms become ions?

Back 10

Electrons are lost or gained

Front 11

What are the 2 types of atoms?

Back 11

1) Cations (+) lose electrons

2) Anions (-) gain electrons

Front 12

Long wavelengths have . . .

Back 12

Low frequency, low energy

Front 13

Short wavelengths have . . .

Back 13

High frequency, high energy

Front 14

What is the smallest particle of an element that maintains the properties of the element?

Back 14

Atom

Front 15

Which particle has a mass that is almost the same as the mass of a proton?

Back 15

Neutrons

Front 16

When does the number of protons = the number of electrons?

Back 16

In a neutral atom

Front 17

What is the mass, charge, and location of a proton?

Back 17

-Mass=1 amu

-Positive

-Located in nucleus

Front 18

What is the mass, charge, and location of a neutron?

Back 18

-Mass= 1 amu

-Neutral

-Located in nucleus

Front 19

What is the mass, charge, and location of an electron?

Back 19

-Mass= 0 amu

-Negative

-Located in orbit

Front 20

What is an atomic number?

Back 20

The # of protons. (If the atom is neutral, #p+ is equal to #e-)

Front 21

How do you write an isotopic name?

Back 21

The name of the element followed by the isotope's mass #

(Ex: oxygen-16)