Element 6.1.1

Which of the following is an element?

• water

• copper

• carbon

• air

What are the building blocks of all substances in the universe?

• molecules

• compounds

• mixtures

• atoms

What is the only type of microscope powerful enough to image individual atoms?

• optical microscope

• electron microscope

• scanning tunnelling microscope

• magnetic resonance imaging (MRI)

What determines whether an element is classified as metallic or non-metallic?

• its properties

• its location on the periodic table

• its atomic number

• its number of valence electrons

Which of the following is a property of metallic elements?

• tend to be dull

• do not conduct heat or electricity

• are brittle

• can be bent into sheets

Which of the following is a property of non-metallic elements?

• tend to be shiny

• are good conductors of heat and electricity

• are malleable

• do not conduct heat or electricity

How many known elements are there?

• 100

• 112

• 118

• 121

How many elements occur naturally?

• 50

• 118

• 98

• 75

What is used to represent elements in the periodic table?

• chemical symbols

• atomic numbers

• element names

• common names

What is the lightest element?

• hydrogen

• carbon

• oxygen

• nitrogen