Question 1

Which part of the atom has a positive charge?

Accepted Answer

proton

Answer

neutron

Answer

electron

Question 2

Which part of the atom has no charge?

Accepted Answer

neutron

Answer

proton

Answer

electron

Question 3

Which part of the atom has a negative charge?

Accepted Answer

electron

Answer

proton

Answer

neutron

Question 4

the total number of protons and neutrons in the nucleus of an atom

Accepted Answer

mass number

Answer

atomic mass

Answer

atomic number

Answer

nuclear number

Question 5

the weighted average mass of the atoms in a naturally occurring sample of an element

Accepted Answer

atomic mass

Answer

atomic number

Answer

mass number

Answer

nuclear mass

Question 6

1/12 the mass of a carbon-12 atom

Accepted Answer

atomic mass unit

Answer

unit charge

Answer

atomic mass

Answer

mass of a proton

Question 7

atoms with the same number of protons but different numbers of neutrons

Accepted Answer

isotopes

Answer

elements

Answer

compounds

Question 8

responsible for atomic theory

Accepted Answer

John Dalton

Answer

Ernest Rutherford

Answer

J. J. Thomson

Answer

James Chadwick

Question 9

discovered the nucleus

Accepted Answer

Ernest Rutherford

Answer

John Dalton

Answer

James Chadwick

Answer

J. J. Thomson

Question 10

discovered the neutron

Accepted Answer

James Chadwick

Answer

Eugen Goldstein

Answer

Ernest Rutherford

Answer

J. J. Thomson

Question 11

discovered electrons

Accepted Answer

J. J. Thomson

Answer

James Chadwick

Answer

Eugen Goldstein

Answer

John Dalton

Question 12

discovered protons

Accepted Answer

Eugen Goldstein

Answer

Ernest Rutherford

Answer

J. J. Thomson

Answer

James Chadwick

Question 13

Which of these statements is false?

Accepted Answer

protons are the lightest subatomic particle

Answer

The nucleus of an atom is positively charged.

Answer

Electrons have a negative charge.

Answer

The neutron is found in the nucleus of an atom.

Question 14

The number of neutrons in an atom of gallium-70 (Ga-70)

Accepted Answer

39

Answer

31

Answer

101

Answer

70

Question 15

the number of electrons in an atom of zinc-66 (Zn-66)

Accepted Answer

30

Answer

96

Answer

36

Answer

66

Question 16

number of protons in a +1 ion of silver-108 (Ag-108)

Accepted Answer

47

Answer

46

Answer

108

Answer

61

Question 17

name of isotope with 22 protons and 26 neutrons

Accepted Answer

titanium-48

Answer

titanium-22

Answer

titanium-26

Answer

titanium-4

Question 18

number of electrons in a -2 ion of sulfur-32 (S-32)

Accepted Answer

18

Answer

16

Answer

32

Answer

14

Question 19

number of neutrons in a +3 ion of nickel-57 (Ni-57)

Accepted Answer

29

Answer

28

Answer

25

Answer

32

Question 20

what is the name of the isotope with 40 protons and 51 neutrons

Accepted Answer

zirconium-91

Answer

antimony-91

Answer

antimony-40

Answer

zirconium-51

Question 21

Which scientist experimented with cathode rays?

Accepted Answer

J. J. Thomson

Answer

Ernest Rutherford

Answer

James Chadwick

Answer

Eugen Goldstein

Question 22

Which scientist used the gold foil experiment?

Accepted Answer

Ernest Rutherford

Answer

James Chadwick

Answer

J. J. Thomson

Answer

Eugen Goldstein

Question 23

The gold foil experiment helped discover what?

Accepted Answer

nucleus

Answer

protons

Answer

electrons

Answer

neutrons

Question 24

The cathode ray experiments helped to discover

Accepted Answer

electrons

Answer

neutrons

Answer

the nucleus

Answer

protons

Question 25

The nucleus is __ charged and has a __ mass compared to the electron cloud

Accepted Answer

positive/high

Answer

positive/low

Answer

negative/high

Answer

negative/low

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