Chemistry Final Exam Review

Front

What is synthesis in chemistry?

Back

Synthesis is a chemical reaction where two or more simple substances combine to form a more complex product. Example: Na + Br₂ → NaBr.

Front

How many electrons can fit on the 1st energy level (orbital) in the Bohr Model?

Back

2 electrons.

Front

What products are formed when hydrochloric acid reacts with magnesium?

Back

Magnesium chloride and hydrogen (Mg + 2HCl → MgCl₂ + H₂).

Front

Which of the following is an element: water, salt, carbon dioxide, hydrogen?

Back

Hydrogen is an element.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond that occurs between a metal and a nonmetal, where electrons are transferred from one atom to another.

Front

What is the chemical formula for magnesium chloride?

Back

MgCl₂.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction; the mass of the reactants equals the mass of the products.

Front

What is the pH scale?

Back

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

Front

What is a covalent bond?

Back

A covalent bond is a type of chemical bond where two nonmetals share electrons.