First Semester Test Review--Part 2

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

How many protons does fluorine have?

Back

Fluorine has 9 protons.

Front

What is a chemical change?

Back

A chemical change is a process that results in the formation of new chemical substances.

Front

What is an electron?

Back

An electron is a negatively charged particle that orbits the nucleus of an atom.

Front

What orbits the nucleus of an atom?

Back

Electrons orbit the nucleus of an atom.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What are atoms?

Back

Atoms are the basic units of matter and the defining structure of elements.

Front

What is the difference between elements and compounds?

Back

Elements are pure substances made of only one type of atom, while compounds are substances formed when two or more different types of atoms bond together.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom.