What is the atomic number?

• 24.31

• 24

• 13

• 12

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 

The central region of an atom where its neutrons and protons are is its _______.

• Nucleus 
• Electron cloud
• Core 
• Center 

An atom with atomic number 6 would have how many protons?

• 6
• 12
• 3
• Cannot be determined 

Particles in an atom that are neutral and have no charge are ______. 

• Negatrons 
• Electrons 
• Neutrons 
• Protons 

Which of the following is a negatively charged subatomic particle?

• Electron
• Proton
• Neutron
• Quark

The atomic number of an elements is the total number of which particles in the nucleus?

• Neutrons
• Protons
• Electrons
• Protons and electrons

Where are electrons of an atom found?

• Nucleus
• Electron Cloud
• Some are in the nucleus and some in the electron cloud.
• They are moving everywhere.

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

• Electrons
• Nucleus
• Protons
• Empty space