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What is the charge of a proton?

• a) Positive

• b) Negative

• c) Neutral

• d) Variable

Which subatomic particle is located in the nucleus?

• Electron

• Proton

• Neutron

• Positron

What is the smallest unit of an element?

• a) Atom

• b) Molecule

• c) Compound

• d) Particle

Which of the following is NOT a compound?

• a) Water (H2O)

• b) Oxygen (O2)

• c) Sodium Chloride (NaCl)

• d) Carbon Dioxide (CO2)

How are elements arranged in the periodic table?

• a) Alphabetically

• b) By atomic mass

• c) By atomic number

• d) By chemical reactivity

Which group in the periodic table contains noble gases?

• a) Group 1

• b) Group 2

• c) Group 17

• d) Group 18

Which element has the atomic number 6?

• a) Oxygen (O)

• b) Carbon (C)

• c) Nitrogen (N)

• d) Hydrogen (H)

What is the charge of an electron?

• a) Positive

• b) Negative

• c) Neutral

• d) Variable

Which element is a halogen?

• a) Helium (He)

• b) Fluorine (F)

• c) Potassium (K)

• d) Sodium (Na)

What is the chemical symbol for iron?

• Ir

• Fe

• In

• Ni