Year 8 - Chemical Reactions Quiz

Chemical elements are...

• Made up of one type of atom

• Made up of more than one type of atom chemicall bonded

• Pure substances

Select the example of a chemical element

• Water

• Carbon dioxide

• Hydrogen

• Sand

Chemical compounds are...

• Made up of two or more elements not chemically bonded

• Made up of two or more atoms chemically bonded

• Made up of two or more elements chemically bonded

Select the example of a chemical compound

• Carbon

• Carbon dioxide

• Hydrogen

• Helium

Tags

NGSS.MS-PS1-1

A molecule is...

• Two or more atoms bonded together

• Two or more elements bonded together

• Two or more atoms not chemically bonded

Tags

NGSS.MS-PS1-1

Chemical symbols (for example, the symbol H for hydrogen) are found on the...

Select the correct chemical symbol for chlorine

• C

• Co

• Cl

• CL

Select the correct chemical symbol for sodium

• S

• Na

• So

• NA

Select the correct chemical symbol for magnesium

• Mg

• Mn

• MG

• Ma

In a chemical formula, the small number (for example, the 2 in H₂O) applies to...

• The element immediately following it

• The element immediately before it

• All the elements following it