Chemical Bonding 18a

Covalent compounds

• Share electrons

• gain or lose electrons

• contain a sea of electrons

• conduct electricity

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What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

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Which elements have low EN and tend to lose electrons?

• metals

• nonmetals

• noble gases

• halogens

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How many electrons are needed in the outer energy levels of most atoms to be stable?

• 2

• 4

• 6

• 8

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A anion will be a ____ ion.

• negative

• positive

• neutral

• unstable

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Electronegativity is...

• how good an atom is at attracting electrons

• the ability of an atom to lose electrons

• the energy required to remove an electron from a specific atom

• measure of negative charge of an anion

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The element that probably has the greatest electronegativity is...

• Au

• F

• Ca

• K

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these is the least electronegative element?

• oxygen

• potassium

• chlorine

• nitrogen

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When an atom loses an electron, it becomes a...

• cation

• anion

• neutral ion

• neutral atom

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Why do elements form bonds?

• To become more stable

• To become more reactive

• To become neutrally charged

• To shed excess electrons

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