Elements and Compounds

(a)   is not a compound.

• HCl
• NaCl
• Cl
• CO₂

Salt has a chemical formula of NaCl. Salt is a...

• Compound

• Mixture

• Element

• None of the Above

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

Match the following chemical formulas with their types.

• Elemental Oxygen

• Cu

• Hydrogen Peroxide

• O₂

• Elemental Nitrogen

• N₂

• Copper

• H₂O₂

Tags

NGSS.MS-PS1-1

The atom is the smallest part of (a)  

• An element
• A mixture
• A compound

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.

A section of the Periodic Table is shown. What is the Chemical Symbol for Magnesium?

• 12

• Magnesium

• 24.31

• Mg

Both elements and compounds are pure substances.

• Agree

• Disagree

Located on the Periodic Table

• Elements

• Compounds

• Both