Chemistry Final Exam Review

Front

What is the nuclear charge of a Sodium atom?

Back

The nuclear charge of a Sodium atom is 11, which is the same as its atomic number.

Front

What is the correct symbol for an atom with 8 electrons and a mass of 17?

Back

The correct symbol is \(^{17}_{8}O\), representing an oxygen atom.

Front

What is a change in state?

Back

A change in state is a change in molecular and physical composition.

Front

What condition must be true for a precipitate to form in a reaction?

Back

At least one product must be insoluble in water.

Front

What is the difference between fission and fusion?

Back

Fusion joins lighter elements together to make heavier ones.

Front

Define atomic number.

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is a precipitate?

Back

A precipitate is an insoluble solid that forms when two solutions react.

Front

Explain the concept of 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 of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

Define endothermic reaction.

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings.