Which is an electron?

• A
• B
• C

Where are the most nonmetals located on the periodic table?

• In the bottom row
• On the left side and in the middle
• On the right side
• In the top row

The blue elements (left side) are called 

• metals
• nonmetals
• metalloids
• noble gases

which 2 elements have the same number of valence electrons?

• Mg

• Ca

• B

• He

How many neutrons does Chlorine (Cl) with an atomic number of 17 and an atomic mass of 35.

• 17

• 18

• 19

What kind of charge do electrons have?

• Negative charge

• Positive charge

• No charge

• Electric charge

Which two particles have mass?

• Protons

• Neutrons

• Electrons

• Nucleus

Which atom is the most reactive?

• 
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