What is an element?

• two or more different atoms bonded together

• a substance containing only one kind of atom

• a substance that looks the same throughout

• a substance made of visibly different parts

What is the following substance?

• Mixture

• Pure Substance

• Element

• Compound

Tags

NGSS.MS-PS1-1

Select all the diatomic molecules (there are 2).

• $O_3$

• He

• $N_2$

• $Fe_2$

• $H_2O$

Tags

NGSS.MS-PS1-1

How many neutrons does a Chlorine atom have?

• 17

• 18

• 35

• 36

Tags

NGSS.MS-PS1-1

What is a subscript?

• a number that comes after the symbol and tells how many atoms there are

• a number that comes before the symbol and tells how many neutrons there are

• a number that tells how many protons and neutrons there are in an atom

• a person who lives underground and writes the scripts to television shows

Tags

NGSS.MS-PS1-1

What type of substance is glucose? ( $C_6H_{12}O_6$  )

• element

• compound

• heterogeneous mixture

• homogeneous mixture

Tags

NGSS.MS-PS1-1

What type of substance does the model represent?

• element

• compound

• homogeneous mixture

• heterogeneous mixture

Tags

NGSS.MS-PS1-1

What type of substance is milk?

• element

• compound

• heterogeneous mixture

• homogeneous mixture

Which two types of matter are pure substances?

• element

• compound

• homogeneous mixture

• heterogeneous mixture

Which of the following are elements? (select 3)

• Copper

• Salt

• Oxygen

• Water

• Hydrogen