Atomic Structure

Question 1

a [blank] has a positive charge and mass around 1 amu

Answer 1

proton

Question 2

a [blank] has no charge and a mass around 1 amu

Answer 2

neutron

Question 3

an [blank] has a negative charge and negligible mass

Answer 3

electron

Question 4

the [blank] contains the protons and neutrons while electrons move around it

Answer 4

nucleus

Question 5

the [blank] is the number of protons in a given element

Answer 5

atomic number

Question 6

the [blank] is the sum of an element’s protons and neutrons

Answer 6

mass number

Question 7

[blank] is essentially equal to the mass number

Answer 7

atomic mass

Question 8

[blank] are atoms of a given element (same atomic number) that have different masses

Answer 8

isotopes

Question 9

the three isotopes of of hydrogen go by…

Answer 9

protium, deuterium, tritium

Question 10

[blank] is the weighted average of the naturally occuring isotopes of an element

Answer 10

atomic weight

Question 11

[blank] first postulated that the atom had a dense, positively charged nucleus that made up only of a small fraction of the volume

Answer 11

Rutherford

Question 12

in the [blank] of the atom, a dense, positively charged nucleus is surrounded by electrons revolving around the nucleus in orbits with distinct energy levels

Answer 12

Bohr Model

Question 13

the energy differene between energy levels is called a [blank] first described by Planck

Answer 13

quantum

Question 14

[blank] means that there is not an infinite range of energy levels available to an electron; electrons can only exist only at certain energy levels

Answer 14

quantization

Question 15

the energy of an electron [blank] the farther it is from the nucleus

Answer 15

increases

Question 16

the [blank] of an element is unique; for an electron to jump from a lower energy level to a higher one, it must absorb an amount of energy precisely equal to the energy difference between two levels

Answer 16

atompic absorption spectrum

Question 17

the [blank] posits that electrons do not travel in defined orbits but rather are localized in orbitals

Answer 17

quantum mechanical model

Question 18

an [blank] is a region of space around the nucleus defined by the probability of finding an electron in that region of space

Answer 18

orbital

Question 19

the [blank] states that it is impossible to know both an electron’s position and its momentum exactly at the same time

Answer 19

Heisenberg uncertainty principle