Chemistry Final Exam

Front

What is the process called when energy is released during a chemical reaction?

Back

Exothermic reaction.

Front

True or False: Elements are chemically combined substances that can be broken down into simpler substances.

Back

False. Elements are pure substances that cannot be broken down into simpler substances.

Front

What do ionic and covalent bonds have in common?

Back

They both fill outer electron shells.

Front

Which part of an atom carries a negative charge?

Back

The electron cloud.

Front

What type of bond is formed when atoms share electrons?

Back

Covalent bond.

Front

Define an ionic bond.

Back

An ionic bond is formed when one atom transfers electrons to another atom, resulting in the attraction between positively and negatively charged ions.

Front

What is a covalent bond?

Back

A covalent bond is formed when two atoms share one or more pairs of electrons.

Front

What is the role of electrons in chemical bonding?

Back

Electrons are involved in forming bonds between atoms by being shared or transferred.

Front

What is an exothermic reaction?

Back

A reaction that releases energy, usually in the form of heat.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.