Atoms

Question 1

a subatomic particle that has a negative charge.

Answer 1

electron

Question 2

in physical science, an atom’s central region, which is made up of protons and neutrons.

Answer 2

nucleus

Question 3

a region around the nucleus of an atom where electrons are likely to be found.

Answer 3

electron cloud

Question 4

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

Answer 4

proton

Question 5

a unit of mass that describes the mass of an atom or molecule.

Answer 5

atomic mass unit

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

Answer 7

atomic number

Question 8

the smallest unit of an element that maintains the properties of that element.

Answer 8

atom

Question 9

the mass of an atom expressed in atomic mass units.

Answer 9

atomic mass