Gold (Au) ... .

• is a nobel gas.

• reacts to everything

• is one of the most reactive elements.

• is one of the most unreactive elements

Hydrogen (H) ... . (mark the two correct answers)

• is more widespread common other elements

• is most wiedespread or common element in the universe

• is the most widespread or common element in the universe

• is more widespread and common than other elements

Fluorine (F) ... .

• is the heaviest halogen

• is the lightest halogen

• is the lightest element

• is the heaviest element

Carbon (C) ... .

• contributes to some of the deadliest toxins

• contributes to some of the deadlier toxins

• is the deadlier element

• is the deadliest element

Which sentence is grammatically correct?

• The sodium is more reactive than the lithium.

• Sodium is more reactive than lithium.

• The lithium is more reactive than the sodium

• Lithium is more reactive than sodium

Sulfur/ Sulphur (S) ... . (mark the two correct answers)

• can have a really bad smell

• helps us make fire

• is the tenth most common element by mass on Earth

• is the fifth most common element in the universe.

Nitrogen (N) ... .

• is a component of all proteins

• is a component of some proteins

• is not found in living systems

• is the rarest element in nature

Mercury (Hg) ... .

• is the heavyer and dangourest metal

• is the heaviest and dangerousest metal

• is the heaviest and most dangerous metal

• is the most heavy and most dangerous metal

Oxygen (O) ... .

• is the reactiver element

• is the most reactive non-metallic element

• is the most reactive element

• is the reactivest element

This quiz is ... (mark the two grammatically correct answers)

• the easiest in the world

• the easyer in the world

• easier than others

• easyer than others