Covalent Bonds

What type of bond is formed when atoms share electrons?

• Covalent

• Ionic

• Hydrogen

• Polyatomic

An atom of iodine has 7 valence electrons. What will an atom of iodine MOST likely do to be stable?

• Lose 1 electron

• Lost 7 electrons

• Gain 1 electron

• Neither gain nor lose any valence electrons

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

An atom of neon has 8 valence electrons. What will an atom of neon MOST likely do to be stable?

• Gain 1 electron

• Lose 2 electrons

• Lose 8 electrons

• Neither gain nor lose any valence electrons

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NGSS.HS-PS1-1

How are ionic and covalent bonds alike?

• They both form organic molecules.

• They both fill outer electron shells.

• They both transfer electrons from one atom to another.

• They both transfer protons from one atom to another.

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A chemical bond formed by atoms that are sharing one or more electrons.

• Chemical Bond

• Covalent Bond

• Alkali Metals

• Valence Electrons

A method for representing an atom's valence electrons using dots around the element symbol.

• Karl's Electron Map

• Oxidation Number

• Lewis Dot Diagram

• Dot matrix

A water molecule is held together by this type of bond

• Ionic

• Non polar covalent

• Hydrogen

• Polar covalent

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NGSS.HS-PS1-1

Why can water have no net charge but have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive

• The hydrogen end is slightly negative and the oxygen end is slightly positive

• The hydrogen and oxygen ends change in polarity

• Because it is hydrophobic

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NGSS.MS-PS1-1

What is a covalent bond?

• A bond formed by the sharing of electrons between atoms

• A bond formed by the transfer of electrons from one atom to another

• A bond formed by the sharing of protons between atoms

• A bond formed by the transfer of protons from one atom to another

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NGSS.HS-PS1-1

Which of the following molecules is held together by covalent bonds?

• NaCl

• H2O

• MgO

• CaCl2

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NGSS.MS-PS1-1