Chemistry Fall Review 2024

Front

What is a dependent variable in an experiment?

Back

A dependent variable is the variable that is measured or tested in an experiment, which is affected by changes in the independent variable.

Front

How many neutrons does Argon have in its nucleus?

Back

Argon has 22 neutrons in its nucleus.

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.

Front

When do you need to use Roman numerals in chemical naming?

Back

Roman numerals are used in chemical naming to indicate the oxidation state of transition metals in compounds.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is the formula for calculating the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the law of conservation of mass?

Back

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