Atoms Bonding

Which is a property shared by most molecular compounds?

• high boiling point

• high melting point

• low melting point

• nonpolar bonds

When an atom loses an electron, it becomes a

• positive ion.

• neutral ion.

• negative ion.

• neutral atom.

Magnesium bromide is an ionic compound with the chemical formula MgBr2.

 What does the “2” tell you?

• Bromide has a 2- charge.

• There are two magnesium ions to every bromide ion.

• There are two bromide ions for every magnesium ion.

• Bromide has a 2+ charge.

The chemical name for the compound with the formula Na2S is

• sodium fluoride.

• magnesium sulfide.

• lithium oxide.

• sodium sulfide

What is a double bond?

• a bond between two atoms

• one pair of electrons shared between two atoms

• two pairs shared between two atoms

• two pairs of electrons shared between four atoms

Electrons involved in bonding between atoms are

• valence electrons.

• inside the nucleus.

• closest to the nucleus.

• positively charged.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following terms means that metals can be rolled into thin sheets, as in 

aluminum foil, or beaten into complex shapes?

• polar

• alloy

• ductile

• malleable

Which of the following groups contains the most reactive elements?

• the alkali metals

• the alkaline earth metals

• the carbon family

• the carbon family

Which of the following is a property of ionic compounds?

• They have low melting points.

• They have low boiling points.

• They form hard, brittle crystals.

• They contain no charged particles.

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NGSS.HS-PS1-3

An ionic bond is the attraction between...

• similarly charged ions.

• oppositely charged ions.

• neutral ions.

• neutral atoms.

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NGSS.HS-PS1-3