PHY SCI FINAL REVIEW

Front

What is the number of neutrons in one atom of sulfur with an isotopic mass number of 34 amu?

Back

18

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation.

Front

What is the chemical formula for aluminum fluoride?

Back

AlF₃

Front

What are the reactants in the electrolysis of water represented by the equation: 2 H₂O → 2 H₂ + O₂?

Back

Water (H₂O) is the reactant.

Front

What is the IUPAC name for K₂O?

Back

Potassium oxide.

Front

Define isotopes.

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.

Front

What is the difference between an ionic bond and a covalent bond?

Back

An ionic bond is formed by the transfer of electrons, while a covalent bond is formed by the sharing of electrons.

Front

What is the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.

Front

What is the formula for calculating density?

Back

Density = Mass/Volume.