Atom & Ion

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

If an atom contains exactly three protons, then it's an atom of ....

• lithium

• gold

• nitrogen

• carbon

The center of the atom, which contains protons and neutrons, is called ....

• the shell

• the nucleus

• the cell

• the control center

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

• 14
• 28
• 2
• 4

How do you determine the mass number of an atom?

• Add protons, neutrons, and electrons
• Add protons and neutrons
• Add protons and electrons
• It is equal to the number of protons

• Neutral atom
• Negative Ion 
• Positive ion

Charge

• +2 Ion 
• -2 Ion
• Neutral atom 

• -2 ion
• +2 ion 
• Neutral atom