Unit 3 Test Elements

What is the symbol for chlorine?

• Ch
• C
• Cl
• Ce

• I and III
• I and IV
• II and IV
• II, III, and IV

The chemical symbol for nitrogen is —

• Na
• Ni
• Ne
• N

• sodium—living matter
• Carbon—oceans
• Hydrogen—oceans
• Chlorine—living matter

The chemical symbol Ca represents —

• chlorine
• cesium
• carbon
• calcium

Which of the following is not an element?

• Helium
• Nitrogen
• Water
• Sodium

• Sodium
• Nitrogen
• Hydrogen
• Oxygen

• The boiling points increase in a predictable pattern.
• The melting points decrease as you move down the table.
• There are no patterns of data in the table.
• The melting points increase as you move down the table.

Which of the following substances is an element?

• CO₂
• NaS
• Co
• KF

• Model A
• Model B
• Model C
• Model D