Elements, Compounds, and Mixtures Quiz

What is an element?

• A compound made from different types of atoms

• A mixture of two or more substances

• A substance that can be broken down into simpler substances

• A pure substance made from only one type of atom

How many chemical elements are there?

• 94

• 150

• 118

• 4

Where are metals found on the periodic table?

• On the right-hand side

• In the middle and on the left-hand side

• At the top

• At the bottom

What is the formula for water?

• H₂O

• O₂

• CO₂

• NaCl

Tags

NGSS.MS-PS1-1

What is a compound?

• A mixture of elements and compounds

• A substance that cannot be broken down

• A pure substance made from more than one element chemically bonded together

• A substance made from only one type of atom

Tags

NGSS.MS-PS1-1

Which technique can be used to separate elements in a compound?

• Thermal decomposition

• Crystallisation

• Evaporation

• Filtration

Tags

NGSS.MS-PS1-4

What is the smallest particle of an element?

• Electron

• Molecule

• Atom

• Compound

Tags

NGSS.MS-PS1-1

What is the main difference between a compound and a mixture?

• Compounds are chemically bonded, mixtures are not

• Mixtures are pure substances, compounds are not

• Compounds can be separated by physical processes, mixtures cannot

• Mixtures have fixed ratios, compounds do not

What is the symbol for helium?

• Ho

• Hg

• He

• H

What is the periodic table used for?

• To show particle diagrams

• To list all chemical elements and arrange them in a useful way

• To separate mixtures

• To list all known compounds