Compounds and Elements

Elements are represented by a...

• More than one capital letter

• chemical symbol

• chemical formula

• oxygen

Tags

NGSS.MS-PS1-1

How many different atoms are in a compound?

• 1

• 2 only

• 2 or more

Tags

NGSS.MS-PS1-1

How many elements are there?

• 100

• 40

• 10,000

Mixtures can NOT be separated by physical changes.

• True

• False

What three groups are elements classified in?

• nonmetals, metalloids, metals

• varieties, pure substances, compounds

• solubility, malleability, electrical conductivity

Sanaa has made herself tea. She says this is a heterogeneous mixture. Is she wrong?

• No, because this is a suspension. Which is an example of an heterogeneous mixture.

• Yes, because this is a solution. The tea dissolves.

• No, because is a colloid. It is heterogeneous because it is spread throughout.

• Yes, because a heterogeneous mixture makeup is different. Homogeneous is spread throughout.

Marissa thinks that since iron is an element it can't be broken down by any means. Brandon thinks that she's wrong since rust is an example of iron being broken down. Who's correct?

• Marissa because elements can't be broken down

• Brandon because elements can be broken down with chemical changes.

• Marissa because iron is too strong to be broken down

• Brandon because rusting is a physical change.

Tags

NGSS.MS-PS1-2

Name a relationship between atoms and elements

• Atoms make up matter and elements have atoms in them

• Elements are smaller than atoms and atoms are made up of elements

• Atoms are also called elements

Where on the periodic table can oxygen be found?

• left/ far left

• far right

• The middle

Compounds can be separated into simpler substances by...

• Physical means

• Chemical means

• Both

• Neither