Ch 4: Atomic Theory and Structure

Question 1

The positive charge of an atom is

Accepted Answer

concentrated in the center of the atom

Question 2

If an atom has more protons than electrons, it's charge is

Accepted Answer

positive

Question 3

If an atom has 19 protons and 17 electrons, its charge is

Accepted Answer

+2

Question 4

The scientist who first developed the planetary model of the atom was

Accepted Answer

Rutherford

Question 5

The atomic number tells the number of _ in an atom

Accepted Answer

protons

Question 6

The atomic mass tells the number of _ in an atom

Accepted Answer

protons + neutrons

Question 7

If you change the number of neutrons in an atom,

Accepted Answer

it becomes an isotope

Question 8

Which subatomic particle has a negative charge?

Accepted Answer

electron

Question 9

If an atom has no charge (is neutral), it will have the same number of

Accepted Answer

protons and electrons

Question 10

The scientist who first developed the "plum pudding" model (or chocolate chip cookie) was

Accepted Answer

Thomson

Question 11

Thompson's experiments proved that an atom

Accepted Answer

contains negatively charged particles

Question 12

If an atom has an equal number of protons and electrons, its charge is

Accepted Answer

neutral

Question 13

The smallest particle in an atom is the

Accepted Answer

electron

Question 14

Rutherford's gold foil experiment proved that

Accepted Answer

atoms are mostly empty space

Question 15

The scientist who proved that electrons exist by using a cathode ray tube was

Accepted Answer

Thomson

Question 16

Who performed the gold foil experiment?

Accepted Answer

Rutherford

Question 17

To find the charge of an atom, use the equation

Accepted Answer

# of protons - # of electrons

Question 18

An atom with a different number of neutrons is called a(n)

Accepted Answer

isotope

Question 19

The second level of a Bohr model can hold

Accepted Answer

8 electrons

Question 20

Who is known as the father of atomic theory?

Accepted Answer

Dalton

Question 21

If an atom has more electrons than protons, its charge is

Accepted Answer

negative

Question 22

The Greek word "atomos" means

Accepted Answer

undividable

Question 23

Which of the following is unique for any given element?

Accepted Answer

the number of protons

Question 24

The first level of a Bohr model can hold

Accepted Answer

2 electrons

Question 25

How many electrons does it take to equal the mass of one proton?

Accepted Answer

2000

Question 26

The first scientist/philosopher to use the word "atom" was

Accepted Answer

Democritus

Question 27

A charged atom is called a(n)

Accepted Answer

ion

Ch 4: Atomic Theory and Structure

Questions 27

Ch 4: Atomic Theory and Structure

Questions 27