Q4 Week 6 - Chemistry Review

Choose all the items that are elements.

• NaCl (table salt)

• Sulfur

• O₂

• Water

• Air

Choose all of the items that are compounds.

• NaCl (table salt)

• Sulfur

• O₂

• H2O

• Air

Choose all of the items that are mixtures

• NaCl (table salt)

• Sulfur

• O₂

• tap water

• Air

Which element is similar to Li?

• Be

• K

Which element is similar to Mg?

• Ca

• B

Which element is similar to B?

• C

• Al

Which element is the least reactive?

• Li

• Ne

• B

• C

Students in Mrs. Clark's science class are investigating a substance that has the following properties

-shiny

-bends easily

-hard, not easily broken

Based on these properties how would you classify the substance?

• metal

• nonmetal

• metalloid

Rows in the periodic table are called (a)  

Columns in the periodic table are called ​ (b)  

• period
• group

Elements in the periodic table are sorted by:

• Increasing atomic number

• Increasing atomic mass

• Alphabetical order

• Increasing number of valence electrons