Hameeda Chemistry Yr 7 1st Term

a particular kind of matter with uniform properties

• element

• compound

• substance

• homogeneous

the simplest pure substance

• compound

• element

• mixture

• salt

salt is an example of a

• pure substance

• mixture

• element

• compound

two or more substances that are not chemically united

• compound

• heterogeneous

• mixture

• homogeneous

What is this?

• Carbon dioxide is an element.

• Carbon dioxide is bad for trees.

• Carbon dioxide is a compound.

• Carbon dioxide is a solid.

Which describes a property of all elements?

• All elements are pure substances.

• All elements exist in the solid phase.

• All elements are metals.

A student sees the diagram shown in a textbook.

What does the symbol in the diagram represent?

• a compound

• an element

• a molecule

H₂O is an example of a(n):

• A. element

• B. compound

• C. mixture

Au is an example of a(n):

• A. element

• B. compound

• C. mixture

Which is a chemical compound?

• aluminum

• carbonated water

• sodium chloride