Covalent vs Ionic Bonds

Polar covalent bonds form slight electrical charges because...

• some elements pull more strongly on shared electrons

• some elements are electrically charged by ions

• some elements are electrically charged by nuclear forces

• some elements are electrically charged by metals

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Why do elements covalently bond?

• So they can share electrons, and fill both of their valence shells at the same time. They can then become stable.

• So they can receive and gain electrons and become stable

• So they can share electrons, and fill both of their valence shells at the same time. They can then become unstable.

• So they can share electrons, and fill both of their valence shells at the same time. They can then form isotopes.

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Which of the following can form covalent bonds? Choose the best answer

• Metals

• Nonmetals

• Both Metals and nonmetals

• Only nuclear compounds.

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Atoms joined by covalent bonds form?

• Atoms

• Elements

• Molecules

• Ionic compounds

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Oxygen shares two pairs of electrons. It forms a __________ covalent bond

• Single

• Double

• Triple

• Quadruple

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What type of bonding does this picture show?

• Ionic

• Covalent

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When electrons are lost by one atom and gained by another, so that they both get full outer shells.

• Covalent bond

• Ionic bond

• Pairing

• Compound

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What happens to electrons in a covalent bond?

• they are shared

• they are transferred

• they are negative

What type of bonding does this picture show?

• Ionic

• Covalent

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Generally low melting and boiling points

• Ionic compounds

• Covalent compounds

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