Elements and Compounds

What is the substance that is made of one kind of atom?

• Molecule

• Element

• Atom

What is the element with the symbol 'Na'?

• Nitrogen

• Sodium

• Neon

What is the element with the symbol 'Fe'?

• Fluorine

• Iron

• Potassium

What is the element with the symbol 'Hg'?

• Hidrogen

• Mercury

• Chlorine

Which gases are produced if the electricity passes through the water?

• Helium and Oxygen

• Oxygen and Carbondioxide

• Oxygen and Hydrogen

Is air an element?

• Yes

• No

What is the symbol for Calcium?

• CA

• Ca

• C

• Cal

Choose the correct answer in a correct order.

In a periodic table, The columns are called ............. and

rows are called .............

• period, group

• group, period

Which one has the smallest mass in the periodic table?

• Helium

• Lithium

• Hydrogen

Which one is wrong about the metals?

• They are shiny.

• They conduct electricity well.

• They are mostly liquid in room temperature.