How many electrons are in Manganese (Mn) ?

• 12

• 25

• 55

• 30

How many electrons are in Bromine (Br) ?

• 35
• 80
• 5
• 11

Which element has 31 protons ?

• Gallium 
• Germanium
• Gadolinium
• Polonium

Which element has 56 electrons ?

• Barium
• Boron
• Beryllium
• Bromine

Which two subatomic particles are found in the NUCLEUS of at atom?

• protons & nuetrons
• protons & electrons
• neutrons & electrons
• electrons & protons

What type of subatomic particles are found in the cloud?

• neutrons
• electrons
• protons
• reactions

What gives an atom mass?

• Protons & electrons in the nucleus
• electrons in the cloud
• protons & neutrons in the nucleus
• Protons & electrons in the cloud

The subatomic particle with a neutral charge is:

• protons
• electrons
• neutrons
• cloud

Which of the following has a full valence shell?

• Oxygen
• Neon
• Barium
• Carbon

The majority of an atom's mass exists where?

• In the nucleus
• In the electron cloud
• In the space between the nucleus and the electrons
• In the neutrons