Chemistry and Matter

Front

What are electrons on the outermost energy level of an atom?

Back

Valence electrons are the electrons located in the outermost shell of an atom, which are involved in chemical bonding.

Front

What is the smallest unit of a compound?

Back

A molecule is the smallest unit of a compound that retains all the chemical properties of that compound.

Front

Which of the following is not a possible combination: MgCl2, KF, CaBe, MgO?

Back

CaBe is not a possible combination because beryllium (Be) typically does not form compounds with calcium (Ca).

Front

Matter is anything that takes up space and has a ___?

Back

Mass is a measure of the amount of matter in an object.

Front

How many valence electrons does Oxygen (O) have?

Back

Oxygen has 6 valence electrons.

Front

What is the definition of an atom?

Back

An atom is the basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

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 bonded 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.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.