What subatomic particles would you find in the nucleus of an atom?

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

What subatomic particle is electrically neutral (no charge)?

• Proton
• Ion
• Neutron
• Electron

What subatomic particle(s) would be found orbiting the nucleus?

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

The first energy level can hold up to how many electrons?

• 8
• 4
• 2
• 5

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

What is the charge of an electron?

• Positive

• Negative

• Neutral

Which subatomic particle has the least mass?

• Proton

• Neutron

• Electron

What is the atomic number of an element?

• Number of protons

• Number of neutrons

• Number of electrons

What is the maximum number of electrons in the second energy level?

• 2

• 8

• 18