Elements and compounds, physical and chemical changes

Which of the following represents an element?

• H₂O

• NaCl

• H₂

• CaCO₃

Tags

NGSS.MS-PS1-1

What is made up two or more elements that are chemically combined?

• Element

• Compound

• Mixture

• Solids

Tags

NGSS.MS-PS1-1

How many elements are represented in the compound?

Na₂CO₃

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

An element is made up of only one kind of _____.

• isotope

• atom

• plastic

• metal

What is H₂SO₄

made up of?

• 2 hydrogen, 1 sulfur, 4 oxygen

• 2 hydrogen & 4 sodium

• 1 hydrogen, 2 sulfur, 4 oxygen

• 1 hydrogen & 6 sodium

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• element

• mixture of elements

• compound

• mixture of compounds

Tags

NGSS.MS-PS1-1

In this diagram, X represents...

• A compound

• An atom

• A mixture

• An element

Tags

NGSS.MS-PS1-1

In this diagram, Y represents...

• An element

• A compound

• A molecule

• A mixture

Tags

NGSS.MS-PS1-1

Are there any compounds on the periodic table?

• Yes,there are many.

• No,because only elements are on the periodic table.

Match the following vocabulary

• 2 or more elements combined chemically

• Atom

• The smallest part of a chemical element

• Molecule

• 2 or more atoms held together by a chemical bond

• Compound

• A pure substance represented by a chemical symbol

• Element

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1