Review for Assessment 2

Front

What is a negatively charged particle?

Back

An electron is a negatively charged particle.

Front

What is the only substance with a neutral pH of 7?

Back

Water is the only substance with a neutral pH of 7.

Front

What are periods in the context of the periodic table?

Back

Periods are horizontal rows in the periodic table that indicate the energy level of the electrons.

Front

Is the process of rusting a physical or chemical change?

Back

Rusting is an example of a chemical change.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What is the pH scale used for?

Back

The pH scale is used to measure the acidity or alkalinity of a solution.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

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 made of two or more different types of atoms chemically bonded together.