Classifying Matter

Provided is a list of five different substances.

NaOH     Cu    H2O     N2    H2

How many of these substances are elements?

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

Which of the following is the best description of an element?

• A substance that cannot be broken down into simpler substances.

• A naturally occurring mineral made of more than one substance.

• A small particle made with a specific chemical composition.

• A collection of atoms that have different abilities when joined together.

Which element makes up most of Earth's atmosphere?

• Hydrogen

• Carbon

• Oxygen

• Nitrogen

Below is a list of some substances and their symbols.

Oxygen O

Sodium Chloride NaCl

Gold Au

Neon Ne

How many of these substances are an example of an element?

• 1

• 2

• 3

• 4

How are elements and compounds different?

• A compound is represented by a chemical formula, and elements are represented by a chemical symbol.

• Compounds are represented by chemical symbols of one letter, and elements are represented by symbols of two letters.

• Elements are pure substances, and compounds are not.

• Elements are always larger units of matter, and compounds are smaller.

How many elements are in the compound Fe₂O₃?

• 0

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

Hydrogen is considered an element, while hydrogen peroxide is considered a compound. This is because hydrogen peroxide is...

• is used for cleaning wounds.

• made of two different elements.

• is a liquid.

• useful to human beings.

Tags

NGSS.MS-PS1-1

The smallest particle of matter

• Element

• Compound

• Atom

• Chemical

Pure substances are

• alloys and can be represented by one chemical symbol

• elements and can be represented by one chemical symbol

• mixtures and can be represented by two or more chemical symbols.

• solutions and can be represented by two or more chemical symbols.

Salt solution , Frozen yogurt , Copper penny , Baking powder. What do they all have in common?

• They are all made of atoms

• They are in the same state of matter.

• They have the same chemical properties.

• They have the same physical properties.

Tags

NGSS.MS-PS1-1