Chemistry Quiz

What does each row in the periodic table represent?

• Group

• Period

• Element

• Molecule

Which of these gases is monatomic?

• Oxygen

• Nitrogen

• Helium

• Hydrogen

The atomic number of an element tells us the number of:

• Protons

• Neutrons

• Electrons and protons

• Protons and neutrons

Which is an example of a diatomic gas?

• Neon

• Argon

• Oxygen

• Helium

What is the mass number of an element with 6 protons and 7 neutrons?

• 6

• 7

• 13

• 12

What is a molecule?

• A single atom

• A group of bonded atoms

• A type of compound

• An element

Which of these is a molecular compound?

What are polymers made of?

• Lattices

• Long chains of repeating molecules

• Metals

• Gases

In one molecule of water (H₂O), how many atoms of hydrogen and oxygen are present?

• 1 hydrogen atom, 2 oxygen atoms

• 2 hydrogen atoms, 1 oxygen atom

• 1 hydrogen atom, 1 oxygen atom

• 2 hydrogen atoms, 2 oxygen atoms

Which is an example of a mixture?

• Water

• Air

• Salt (NaCl)

• Carbon dioxide (CO₂)