The REAL 8th grade science final

Front

What determines the energy of an electron in an atom?

Back

The energy of an electron varies depending on the energy level that the electron occupies.

Front

What subatomic particles are found in the electron cloud?

Back

Electrons are the subatomic particles found in the electron cloud.

Front

What does the law of conservation of mass state about chemical reactions?

Back

According to the law of conservation of mass, the mass of the products in a chemical reaction is always equal to the mass of the reactants.

Front

What type of reaction is represented by the equation: Mg + Al2O3 -> Al + MgO?

Back

This is a Single Replacement reaction.

Front

Do atoms of different elements have the same number of protons?

Back

No, atoms of different elements have different numbers of protons.

Front

What is an atom?

Back

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

Front

What are protons and where are they located?

Back

Protons are positively charged subatomic particles located in the nucleus of an atom.

Front

What is the charge of neutrons?

Back

Neutrons have no charge; they are neutral particles found in the nucleus of an atom.

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.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that involves the rearrangement of the molecular or ionic structure of a substance.