Chemistry Ch 6 Review 1

How many outer electrons does Hydrogen have?

• 1

• 2

• 8

• Hydrogen doesn't have valence electrons

Answer explanation

Group 1 elements have 1 outer electron.

Tags

NGSS.HS-PS1-1

How many outer electrons does Oxygen have?

• 2

• 6

• 16

• Oxygen doesn't have valence electrons

Answer explanation

Group 16 elements have 6 outer electrons.

Tags

NGSS.HS-PS1-1

When two nonmetals bond but do not share electrons evenly, the resulting bond will be ____.

• ionic

• nonpolar covalent

• polar covalent

• metallic

Answer explanation

Uneven sharing is polar. Even or nearly even sharing is nonpolar.

Tags

NGSS.HS-PS1-1

Which of the following will make a bond with 100% covalent character?

• NaCl

• O₂

• FrF

• No bond can be 100% covalent

Answer explanation

The electronegativity difference for two of the same element will always be 0 and that is even sharing which is 100% covalent character.

Which of the following will make a bond with 100% ionic character?

• NaCl

• O₂

• FrF

• No bond can be 100% ionic

Answer explanation

FrF gets closest but it isn't 100% ionic.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element is not commonly found as a diatomic molecule?

• hydrogen

• iodine

• nitrogen

• carbon

Answer explanation

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How does an atom become a positive ion?

• by gaining one or more electrons

• by gaining one or more protons

• by losing one or more electrons

• by losing one or more protons

Answer explanation

Lose a negatively charged electron and what's left becomes more positive.

How does an atom become a negative ion?

• by gaining one or more electrons

• by gaining one or more protons

• by losing one or more electrons

• by losing one or more protons

Answer explanation

Gain a negatively charged electron and what's gains it becomes more negative.

Which of the following is a polyatomic ion?

• H₂

• O^-2

• NO₃^-1

• H₂O

Answer explanation

It is a charged particle made of more than one atom. There are many others that exist.

How are polyatomic ions held together?

• ionic bonds

• covalent bonds

• ionic and covalent bonds

• metallic bonds

Answer explanation

Held together with covalent bonds but will bond to other ions with ionic bonds.