Chemistry 1 Semester 1 Final Review 24-25

Front

What is a variable in an experiment?

Back

A variable is the factor being tested or changed in an experiment.

Front

What does Boyle's Law state about the relationship between pressure and volume of a gas?

Back

Boyle's Law states that if the volume of a gas decreases while the temperature remains constant, the pressure of the gas increases.

Front

How do you determine the number of protons, neutrons, and electrons in an isotope?

Back

The number of protons is equal to the atomic number, neutrons can be found by subtracting the atomic number from the mass number, and electrons are equal to protons in a neutral atom.

Front

What type of change is represented by the reaction Li + Be → B?

Back

This reaction represents a nuclear change.

Front

How do you calculate the density of a substance?

Back

Density is calculated by dividing the mass of the substance by its volume (Density = Mass/Volume).

Front

What is the formula for calculating pressure in a gas?

Back

Pressure = Force/Area.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of a substance.

Front

What is the significance of the atomic number of an element?

Back

The atomic number indicates the number of protons in the nucleus of an atom and determines the element's identity.

Front

What is the principle of conservation of mass?

Back

The principle of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.