Unit 1: Elements, Compounds, and Molecules

Which of the following particle diagrams show molecules of a mixture of elements?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

The particle diagram above shows:

• an element.

• a compound.

• a mixture of elements.

• a mixture of compounds.

Tags

NGSS.MS-PS1-1

Which of the following lists contains only elements?

• air, iron, iodine, magnesium
• zinc, gold, aluminium, oxygen
• nitrogen, copper, mercury, water
• chlorine, argon, sodium, limestone

The correct way to write the chemical symbol for the element calcium is:

• ca
• CA
• Ca
• cA

Which of the following shows the particles in a mixture of compounds?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

The smallest particle of an element to still be that element is ________.

• Element

• Atom

• Molecule

• Compound

All of the following are elemental molecules EXCEPT:

• carbon

  C₄

• nitrogen

  N₂

• oxygen

  O₃

• water

  H₂O

Tags

NGSS.MS-PS1-1

The letter, C, is a ... of carbon.

• Nickname

• Chemical Symbol

• Pseudonym

Tags

NGSS.MS-PS1-1

Match the following elements with their symbols.

• Copper

• Cu

• Sodium

• He

• Chlorine

• Cl

• Gold

• Au

• Helium

• Na

Match the following elements with their symbols.

• Nitrogen

• N

• Sulfur

• C

• Hydrogen

• O

• Oxygen

• S

• Carbon

• H