Chemical Formulas & Oxidation Numbers

What is the oxidation number of chlorine in KCl?

• +1

• -1

• +5

• +7

What is the oxidation of C in CH₄?

• -4
• -1
• +4
• +1

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What element's don't have oxidation numbers?

• alkali metals
• noble gases
• halogens
• alkaline earth metals

Ionic bonds are formed when electrons get

• Shared between two atoms

• Removed from both atoms

• Transferred from one atom to another

• Added to both atoms

Tags

NGSS.MS-PS1-1

Ionic bonds typically form between

• A metal and a nonmetal

• Two nonmetals

• Two metals

• A metalloid and a metal

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Anions ____ electrons, becoming _____ charged.

• Gain; positively (+)

• Gain; negatively (-)

• Lose; positively (+)

• Lose; negatively (-)

Tags

NGSS.HS-PS1-3

Cations _______ electrons, becoming _______ charged.

• Gain; positively (+)

• Gain; negatively (-)

• Lose; positively (+)

• Lose; negatively (-)

Tags

NGSS.MS-PS1-1

Lead Chloride is an ionic compound, made up from Pb²⁺ ions and Cl^- ions. Which is the correct formula for this compound?

• PbCl₃

• PbCl

• PbCl₄

• PbCl₂

Tags

NGSS.MS-PS1-1

Which of the following is a covalent compound?

• MgCl₂

• NaCl

• O₂

• NaO₂

Tags

NGSS.MS-PS1-1

What is the charge of an oxide (O) ion?

• +1

• -2

• +2

• -1