Exploring Elements and Compounds for Kids

What is the smallest unit that retains the property of any element?

• Electron

• Compound

• Atom

• Molecule

Which of the following is an example of an element found in nature as a gas?

• Carbon Dioxide

• Water

• Argon

• Salt

What is the chemical symbol for gold?

• Au

• Ag

• Go

• G

Which of the following is an example of a solid element?

• Oxygen

• Hydrogen

• Aluminium

• Chlorine

What is the chemical symbol for carbon?

• Ca

• C

• Co

• Cr

Which of the following is a compound formed by the chemical reaction of hydrogen and oxygen?

• H2O

• O2

• H2

• HO

What is the chemical formula for common table salt?

• NaCl

• ClNa

• NaO

• KCl

Which of the following is NOT a property of a compound?

• It has a unique set of properties.

• It is formed by a chemical reaction.

• It can be broken down into simpler elements.

• It retains the properties of the elements it is formed from.

Which of the following substances contains both elements and compounds?

• Water

• Air

• Gold

• Salt

How many elements have been observed as of now?

• 100

• 117

• 150

• 200