What is the atomic number?

• Number of neutrons in an element

• Total number of electrons in an atom

• Number of protons in the nucleus of an element

• Number of isotopes of an element

Which groups are considered representative elements?

• Groups 1-3

• Groups 3-12

• Groups 14-16

• Groups 1-2 and 13-18

What is a characteristic of alkali metals?

• They have high melting points

• They are shiny and highly reactive

• They are found in nature as free elements

• They are all gases at room temperature

What is the use of lithium?

• In batteries

• In fertilizers

• In construction materials

• In food preservation

What is the common name for sodium chloride?

• Sodium sulfate

• Sodium bicarbonate

• Table salt

• Baking soda

Which element is essential for human health and found in bananas?

• Calcium

• Potassium

• Magnesium

• Iron

What is the main characteristic of alkaline earth metals?

• They are highly reactive

• They have high densities

• They are all gases

• They are all solid at room temperature

What is silicon commonly found in?

• Water

• Soil

• Sand

• Air

What is the other name for halogens?

• Inert gases

• Alkali metals

• Noble gases

• Reactive nonmetals

What happens when halogens react with alkali metals?

• They form noble gases

• They form salts

• They form acids

• They form bases