Periodic Table

What does the 6 represent?

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

the positively charged subatomic particle contained in the nucleus of an atom

• proton

• neutron

• electron

• matter

a subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge

• proton

• neutron

• electron

• matter

The atomic number of this pictured element is

• 28
• 58.6934
• Ni
• Nickel

How many protons are in this element?

• 79
• 196
• 117
• Cannot be determined

How many neutrons are in a Gold atom?

• 79
• 196
• 118
• 275

• Periods
• Groups

• Periods
• Groups

How many electrons does Si contain? (click to see image)

• 14
• 28
• 2
• None of these

What group does this element belong to?

• Group 1: Alkali metals
• Group 18: Noble Gases
• Group 2: Alkaline-Earth Metals
• Group 17: Halogens