First Semester Chemistry Review 2019

Front

In which region(s) of the heating curve would water be a liquid and a gas at the same time?

Back

Region D of the heating curve represents the phase change where water exists as both a liquid and a gas (steam) simultaneously.

Front

What is the smallest subatomic particle with virtually no mass?

Back

The electron is the smallest subatomic particle with virtually no mass.

Front

What determines the identity of an element?

Back

The identity of an element is determined by the number of protons in its nucleus.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a type of mixture where the components are not evenly mixed, and different parts can be seen.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical composition.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout, and the different components are not distinguishable.

Front

What is the boiling point of water at standard atmospheric pressure?

Back

The boiling point of water at standard atmospheric pressure is 100 degrees Celsius (212 degrees Fahrenheit).

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 of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.