Chemistry checkpoint

Which two families are highly reactive?

• Transition metals and Noble Gases 
• Alkaline Earth Metals and Nitrogen family 
• Alkali Metals and Halogens
• The Rare Earth metals and Oxygen family 

What are the positively charged particles in an atom called? 

• Protons
• Neutrons
• Electrons
• Nucleus 

True or false: everything is made of atoms

• True
• False

What two molecules are located inside of the nucleus of an atom?

• Electrons and Neutrons
• Protons and Electrons 
• Protons and Neutrons 

_{How many protons does Helium have?}

• 4
• 4.0026
• 2
• 1

What kind of charge do electrons have?

• Positive
• Negative
• No charge
• Explosive

Which type of element is shiny, ductile and malleable?

• metal
• nonmetal
• metalloid
• play dough

These elements are dull, brittle, and poor conductors. 

• metals
• nonmetals
• metalloids
• transformers

Which of these is NOT a pure substance?

• elements
• compounds
• mixtures
• they are all pure substances

These elements are called semiconductors.

• metals 
• nonmetals
• metalloids
• The guy at the front of a train