Exploring Elements, Compounds, and Mixtures

How many different types of atoms are there?

• 100

• 200

• 118

• 150

What is the periodic table used for?

• To organize different types of atoms

• To organize different types of molecules

• To organize different types of compounds

• To organize different types of mixtures

Tags

NGSS.MS-PS1-1

Which group of elements prefers to exist as individual atoms?

• Alkali metals

• Halogens

• Noble gases

• Transition metals

What does 'monatomic' mean?

• Four atoms

• One atom

• Three atoms

• Two atoms

Which of the following is a molecular element?

• Hydrogen

• Sodium

• Iron

• Helium

What is a lattice in terms of atomic arrangement?

• A single atom

• A pair of atoms

• A three-dimensional shape formed by atoms

• A two-dimensional shape formed by atoms

Tags

NGSS.MS-PS1-1

What is an example of a molecular compound?

• Iron oxide

• Sodium chloride

• Silicon dioxide

• Water

Tags

NGSS.MS-PS1-1

What is the chemical formula for water?

• NaCl

• H2O

• CO2

• SiO2

Tags

NGSS.MS-PS1-1

Why can't we write a chemical formula for tap water?

• Because it is a pure substance

• Because it is a compound

• Because it is a mixture with unknown proportions

• Because it only contains water molecules

Tags

NGSS.MS-PS1-1

What do mixtures contain?

• Only elements

• Only compounds

• A variety of elements and compounds

• Only molecules