Which element has the chemical symbol 'O'?

What is the lightest element on the periodic table?

Which element has the atomic number 79?

What is the chemical symbol for Potassium?

Which gas is most abundant in the Earth's atmosphere?

What group are noble gases found in the periodic table?

Which element is a liquid at room temperature?

Which element has the chemical symbol 'Fe'?

What is the most reactive group of metals?

Which element is named after the scientist Albert Einstein?