Question

Number of

Protons
Number of
Neutrons
Atomic
Number
Mass
Number
Element
(symbol)
20
20
A
B
С
9
D
E
19
F
Using the periodic table, complete the table to describe each atom. Type in your answers.
А
B
С
D
1

Answer 1

Step-by-step explanation:

Just a few things to remember:

# of neutrons = Mass number - # protons

Mass number = # protons + # neutrons

Atomic Number = # of protons

Symbol - use the atomic number to find the element in the periodic table