Chemical Bonding Review

Which part of the atom is responsible for chemical bonding?

• Inner/Core Electrons
• Outer/Valence Electrons
• Protons
• Neutrons

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What best describes valence electrons?

• Electrons in the inner-most shell.
• Electrons in the outer-most shell.
• Electron that became a beta particle.

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Where are valence electrons located?

• In the inner-most shell of an atom.
• In the outer-most shell of an atom.
• Between the inner and outer shells of an atom.
• Inside the nucleus of an atom.

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How many valence electrons do most atoms need to have a complete outer shell and be happy?

• 1
• 8
• 10
• 5

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Which two elements only need two valence electrons to be happy?

• Hydrogen and Helium
• Lithium and Neon
• Copper and Iron
• Californium and Berkelium

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Why do Hydrogen and Helium only need two valence electrons?

• The first electron shell can only hold two electrons.
• They are both metals.
• They both begin with H.
• They are both gases.

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How many valence electrons do elements in Group 1, the Alkali Metals, have?

• 1
• 2
• 6
• 7

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How many valence electrons do elements in Group 2, the Alkaline Earth Metals, have?

• 1
• 2
• 6
• 7

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If Oxygen has 6 valence electrons and is in Group 16 while Chlorine has 7 valence electrons and is in Group 17, what is the rule between group number and valence electrons?

• Multiply by 2.
• Take the absolute inverse of the square root.
• e=mc²
• Subtract 10.

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How do ions form?

• Atoms gain or lose electrons to fill or empty the valence shell.
• Atoms like cats so they become "pawww-sitive".
• Atoms gain or lose electrons to change their atomic mass.
• Atoms gain or lose electrons to match the number of neutrons.

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