Lesson 3

Question 1

Atomic number = number of ______ = number of electrons in a neutral atom

Answer 1

protons

Question 2

Atomic number = number of protons = ________

Answer 2

number of electrons in a neutral atom

Question 3

Mass number = number of ______ + number of _______.

Answer 3

protons; neutrons

Question 4

Number of Neutrons = _____ number (A) – ______ number (Z)

Answer 4

mass; Atomic