Atoms and Elements

A capital letter or combination of a capital letter and a small letter that is used to represent an element is called a(n) ________

• Element symbol

• Element sign

• Atomic Number

• Atomic Mass

How many Hydrogen are in 4H₂O?

• 6

• 8

• 2

• 4

Tags

NGSS.MS-PS1-1

How many atoms are there TOTAL in:
H₂SO₄

• 6

• 5

• 7

• 3

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1

• 12

• 6

Tags

NGSS.MS-PS1-1

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄

• HSO₄

• H₄S₃O

• H₂O

Tags

NGSS.MS-PS1-1

A subscript is the small number below a(n) ________ that tells the number of _______ of that element.

• element symbol; atoms

• atom; element symbol

• subscript; protons

• compound; elements

Tags

NGSS.MS-PS1-1

A pure substance that cannot be broken down into simpler substances.

• element

• compound

• molecule

• carbon dioxide

O₂

• Element

• Compound

Tags

NGSS.MS-PS1-1

How many atoms are present if there is no subscript following the element symbol?

• 0

• 2

• only 1

• 1 million

Tags

NGSS.MS-PS1-1

HCl has how many atoms of each element?

• H=1, Cl=1

• H=2, Cl=2

• H=3, Cl=1

Tags

NGSS.MS-PS1-1