Chemistry Midterm review 2023-24

Front

What is a dependent variable in an experiment?

Back

The dependent variable is the part of the experiment that the researcher measures, which is affected by changes in the independent variable.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, such as the ability to rust.

Front

What is the name of the element with the atomic number 10?

Back

Neon.

Front

What region of the electromagnetic spectrum has wavelengths smaller than visible light?

Back

Ultraviolet light.

Front

What state of matter is characterized by high energy that separates electrons and protons?

Back

Plasma.

Front

What is an independent variable in an experiment?

Back

The independent variable is the part of the experiment that the researcher changes or controls to test its effects on the dependent variable.

Front

Define physical property.

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical composition, such as color, density, or melting point.

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 constants in an experiment?

Back

Constants are the factors that remain unchanged throughout an experiment to ensure that the test results are valid.

Front

What is the definition of an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.