4.1

Question 1

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

Answer 1

atom

Question 2

in physical science, an atoms central region, which is made up of protons and neutrons

Answer 2

nucleus

Question 3

a subatomic particle that has a negative charge

Answer 3

electron

Question 4

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

Answer 4

electron cloud