8th STAAR Review 1

Element or compound?
O₂

• Element
• Compound

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

How many O's are in Al₂(SO₄)₃

• 4
• 12
• 7
• 24

How many Valence Electrons does Argon have?

• 2
• 3
• 8
• 18

The particles that are found in the nucleus of an atom are

• neutrons and electrons
• electrons only
• protons and neutrons
• protons and electrons

How many protons does Carbon have?

• 3
• 4
• 5
• 6

Which subatomic particle has a neutral charge?

• Proton
• Neutron
• Electron