Atoms and Elements

PICK TWO ANSWERS:

The ATOMIC NUMBER of an element is the same as its

• protons

• electrons

• neutrons

• atomic mass

How do you find the number of NEUTRONS?

• Atomic mass MINUS protons

• Atomic mass PLUS protons

• protons MINUS atomic mass

CHOOSE MORE THAN ONE ANSWER:

What are the 4 ESSENTIAL ELEMENTS?

• carbon

• hydrogen

• nitrogen

• oxygen

• helium

How much of all living things are made up of essential elements?

• 50%

• 75%

• 97%

• 100%

• 1

• 3

• 6

• 0

• 1

• 3

• 6

• 0

• 2

• 3

• 6

All matter in the universe is made of....

• 2

• 3

• 6

How many different kinds of atoms are there in nature?

• 90

• 91

• 92

• 93