Atomic theory test review

Question 1

How do isotopes of an element differ?

Accepted Answer

number of neutrons and atomic mass

Question 2

1/12 of a carbon-12 atom is the standard for ...

Accepted Answer

atomic mass unit

Question 3

Electrons fill an empty orbital on the same energy level before they pair up

Accepted Answer

Hund's rule

Question 4

Quick! Number of protons + number of neutrons equals

Accepted Answer

mass number

Question 5

Which of the following is NOT associated with Rutherford?

Accepted Answer

neutrons

Question 6

It is impossible to pinpoint an electron's location

Accepted Answer

Heisenberg Uncertainty Principle

Question 7

What is the name of our current atomic model?

Accepted Answer

quantum model

Question 8

What is the mass number of an isotope of magnesium with 12 protons and 12 neutrons?

Accepted Answer

24

Question 9

What's a quantum?

Accepted Answer

energy gained or lost by an electron

Question 10

When the numbers of protons and electrons are equal...

Accepted Answer

the atom has no charge

Question 11

Which statement says that electrons fill up lower energy orbitals first?

Accepted Answer

Aufbau principle

Question 12

Which of the following is NOT associated with J.J. Thomson

Accepted Answer

nucleus

Question 13

No 2 electrons can have the same 4 quantum numbers, only 2 electrons can occupy an orbital?

Accepted Answer

Pauli Exclusion Principle

Question 14

What's an alpha particle?

Accepted Answer

It was used in Rutherford's experiment

Question 15

Use your periodic table. How many protons in the isotope cobalt-60?

Accepted Answer

27

Question 16

What is this?

Accepted Answer

line emission spectrum

Question 17

Quick! The weighted average of all of an element's isotopes is...

Accepted Answer

atomic mass

Question 18

Which of the following is NOT associated with John Dalton?

Accepted Answer

discovery of the proton

Question 19

Which of the following is NOT associated with Rutherford?

Accepted Answer

neutrons

Question 20

Which of the following parts of John Dalton's atomic theory are no longer correct today?

Accepted Answer

atoms have the same mass and can't be divided

Question 21

Quick! An element is identified by its...

Accepted Answer

atomic number

Question 22

What is the correct hyphen notation for an isotope of barium with 56 protons and 81 neutrons?

Accepted Answer

barium-137

Question 23

Line of different frequencies are produced when electrons

Accepted Answer

return to ground state from a higher energy level

Atomic theory test review

Questions 23

Atomic theory test review

Questions 23