AP Unit 1

Use your knowledge and electronegativity sheet to predict what the following compound is classified as.

• polar covalent

• nonpolar covalent

• ionic

• metallic

Tags

NGSS.HS-PS1-1

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

• Mg₄N₃

• MgN₂

• Mg₃N₂ 

• MgN

How many molecules are in 2.5 mol of NaCl?

• x 10²⁴ molecules

• molecules

• 4.15 molecules

• x 10²³ molecules

Tags

NGSS.HS-PS1-7

Which element does this mass spectrum most likely represent?

• neon

• scandium

• boron

• sodium

Order the following in increasing atomic radii: 
Ra, Be, Ca, Rb, H

• Ra, Be, Rb, H, Ca

• Rb, H, Ca, Be, Ra

• Ra, Rb, Ca, Be, H

• H, Be, Ca, Rb, Ra

Tags

NGSS.HS-PS1-1

In this type of bond, electrons are delocalized in a "sea"

• Ionic

• Covalent

• Metallic

• Nonpolar

How many electrons are shared in a double bond?

• 2

• 4

• 6

• 8

What type of bond would form between O and O?

• Polar Covalent

• Non-Polar Covalent

• Ionic

What type of bond would form between Li and O?

• Polar Covalent

• Non-Polar Covalent

• Ionic

Choose the correct shape for this molecule:

• Tetrahedral

• Trigonal pyramidal

• Bent

• Trigonal planar