Chemistry Basics

What’s inside

• Which subatomic particle primarily determines the chemical identity of an element?
• Isotopes of the same element have the same number of protons but different numbers of neutrons.
• What is the electron configuration of a neutral oxygen atom, which has atomic number 8?
• A covalent bond forms when atoms transfer electrons completely from one atom to another.
• Which compound contains a polyatomic ion?
• In a balanced chemical equation, the total number of atoms of each element is the same on both sides of the equation.
• What happens to the pH of a neutral solution at 25°C when a small amount of hydrochloric acid is added?
• A catalyst increases the equilibrium constant of a reversible reaction.