Chemistry Review GP4

Front

What is the electronic configuration represented by the Lewis dot structure with 2 electrons in the s orbital and 3 in the p orbital?

Back

s²p³

Front

What does the observation of alpha particles bouncing back in Rutherford's gold foil experiment indicate?

Back

It indicates both empty space in the atom and a dense positive core.

Front

What is the correct chemical formula for Sodium sulfite?

Back

Na₂SO₃

Front

How do ultraviolet rays compare to visible light in terms of wavelength and energy?

Back

Ultraviolet rays have shorter wavelengths and more energy than visible light.

Front

What is the balanced chemical equation for the combustion of methane (CH₄)?

Back

CH₄ + 2O₂ → CO₂ + 2H₂O

Front

What is the product of the reaction between 16g of CH₄ and 64g of O₂?

Back

44g of CO₂ and 36g of H₂O are produced.

Front

Define Lewis dot structure.

Back

A diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Front

What is the significance of Rutherford's gold foil experiment?

Back

It led to the discovery of the atomic nucleus and the understanding that atoms are mostly empty space.

Front

What is the formula for calculating the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the electromagnetic spectrum?

Back

The range of all types of electromagnetic radiation, including visible light, ultraviolet rays, and X-rays.