Core Unit 4 Matter

An atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

True or False? Neutrons have a negative charge

• True
• False

What is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

electrons have this type of charge?

• negative
• positive
• neutral

Most of the mass in an atom is concentrated in the...

• electrons
• nucleus
• protons
• empty space

What does the nucleus consist of?

• Protons + Electrons
• Neutrons + Electrons
• Atoms
• Protons + Neutrons

If the number of protons changes, does the atom change its identity?

• YES!
• NO!

How would H2O be classified? Check all that apply.

• Atom

• Molecule

• Compound