Ionic compounds generally form when ____________ and ________________ react with each other.

• nonmetals and nonmetals
• metals and metals
• metals and nonmetals
• polyatomic elements & nonmetals

Tags

NGSS.HS-PS1-2

The purpose of bonding for most elements is to achieve greater stability and to have a complete ______ of electrons in the outermost energy level.

• pair
• nucleus
• octet
• molecule

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When an ionic compound is formed, its charge is 

• negative
• neutral (no charge)
• positive

Tags

NGSS.HS-PS1-1

Which pair of elements should form an ionic bond?

• Carbon and Oxygen

• Sodium and Fluorine

• Iron and Chromium

• Xenon and Silicon

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When a ionic bond is FORMED energy is ______?

• released

• absorbed

Tags

NGSS.HS-PS1-4

Which has a greater ionic character, KCl or K₂O?

• KCl

• K₂O

Tags

NGSS.HS-PS1-3

Which of the following combinations would need roman numerals in the name?

• potassium + fluorine
• beryllium + oxygen
• boron + iodine
• iron + oxygen

If a sulfate ion has a charge of 2-, how many sodium ions will combine with one sulfate ion?

• 1

• 2

• 3

• 2.5

Tags

NGSS.HS-PS1-2

How do the following two elements bond together?
Cr³⁺  O^2-         

• CrO
• Cr₃O₂
• Cr₂O₃
• CrO₃

Tags

NGSS.MS-PS1-1

The chemical formula for an ionic compound of potassium and oxygen is

• KO.
• K₂O.
• K₂O₂.
• KO₂.

Tags

NGSS.MS-PS1-1