Atomic Structure Valence Electrons Periods and Groups Counting Atoms

Which compound has two times the amount of oxygen as hydrogen.

• H₃PO₄

• H₂SO₄

• HClO₃

• H₂O

Tags

NGSS.MS-PS1-1

How many Oxygen atoms are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

Number of H in 3(NH₄)₂CrO₄

• 4
• 2
• 8
• 24

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

What are the small numbers that go AFTER an element symbol called? Like the 2 in H₂O ?

• subscript
• symbol
• coefficient
• superscript

What is the number that is in FRONT of a formula called? Like the 3 in 3H₂O

• subscript
• coefficient
• symbol
• superscript

Number of neutrons in antimony (Sb)

• 51

• 71

• 122

Tags

NGSS.MS-PS1-1

Number of protons inn beryllium (Be)

• 4

• 5

• 9

Tags

NGSS.MS-PS1-1

How many electrons are in Manganese (Mn) ?

• 12
• 25
• 55
• 30

Which element has 73 protons ?

• Titanium
• Tantulum
• Thallium
• Thorium