Physical Science--Chemistry half

an electron has this charge

• positive
• negative
• neutral

a neutron has this charge

• negative
• positive
• neutral

a proton has this charge

• negative
• positive
• neutral

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

• nucleus 
• electron cloud
• core 
• center 

All matter is made of what?

• energy 
• atoms 
• electrons 
• compounds 

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

what does the 6 represent?

• Atomic mass
• atomic number
• chemical symbol
• element name

What does the atomic number tell us?

• number of protons
• number of neutrons

How many protons are in this element?

• 79
• 196
• 117
• Cannot be determined

What does this show?

• Solid
• Liquid
• Gas