Exploring Ion Formation and Chemical Reactions

What is found at the center of an atom?

• Neutron

• Electron cloud

• Nucleus

• Proton

What are valence electrons responsible for?

• Radioactivity

• Chemical reactions

• Formation of isotopes

• Stability of the nucleus

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How many electrons can the valence shell of larger atoms hold?

• Two

• Four

• Six

• Eight

Why is chlorine highly reactive?

• It has a full outer shell

• It needs one more electron to reach stability

• It has more protons than electrons

• It has a negative charge

What is the charge of a chloride ion?

• Minus one

• Plus one

• Plus two

• Minus two

What is the charge of an oxide ion?

• Minus one

• Plus one

• Minus two

• Plus two

How many electrons does oxygen need to reach a stable outer shell?

• One

• Two

• Four

• Three

What happens to aluminum's valence electrons when it forms an ion?

• They are shared with other atoms

• They are lost

• They remain unchanged

• They are gained from other atoms

What is the charge of an aluminum ion?

• Minus three

• Plus one

• Plus three

• Plus two

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What happens to the outer shell of aluminum when it loses its valence electrons?

• It gains more electrons

• It becomes empty

• The second shell becomes the outer shell

• It remains the same

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