Chemistry Practice

How many Oxygen atoms are in H₂O?

• 1

• 2

• 0

• 4

How many different elements are present in H₂COCH₂

• 5

• 4

• 3

• 2

How many atoms of Hydrogen are in H₂O

• 1

• 2

• 3

• more than 3

What does the 6 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

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

The atomic number of this pictured element is

• 28
• 58.6934
• Ni
• Nickel

2H₂ + O₂ ----> 2H₂O What is the product?

• ------>
• 2H₂O
• 2H₂+ O₂

2H₂ + O₂ --------> 2H₂O What  are the reactants?

• ----->
• 2H₂O
• 2H₂ +O₂