science ch.4

Question 1

A subatomic particle that has a negative charge

Answer 1

Electron

Question 2

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

Answer 2

Atom

Question 3

In physical science, An atom’s central region, which is made up of protons and neutrons

Answer 3

nucleas

Question 4

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

Answer 4

electron cloud

Question 5

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

Answer 5

proton

Question 6

A unit mass that describes the mass of an atom or molecule

Answer 6

Atomic mass unit

Question 7

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

Answer 7

neutron

Question 8

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

Answer 8

atomic element

Question 9

An atom that 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 9

isotope

Question 10

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

Answer 10

Mass number

Question 11

the mass of an atom expressed in atomic mass units

Answer 11

atomic mass