4.2 The Atom

Question 1

a subatomic particle that has a positive charge and that is found in the nucleus of an atom

Answer 1

proton

Question 2

the umber of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element

Answer 2

atomic number

Question 3

a unit of mass that describes the mass of an atom or mulecule

Answer 3

atomic mass unit

Question 4

an atom has the same number of protons (or the same atomic number) as other atoms of the same element do, but that has a different number of neutrons (and thus a different atomic mass)

Answer 4

isotope

Question 5

the sum of the numbers of protons and neutrons in the nucleus if an atom

Answer 5

mass number

Question 6

a subatomic particle that has no charge and that is found in the nucleus of an atom

Answer 6

neutron

Question 7

the mass of an atom expressed in atomic mass units

Answer 7

atomic mass

Question 8

pushes or pulls between objects

Answer 8

forces