Physical Science Final Exam Review

Front

How many valence electrons are found in atoms of group 15?

Back

5

Front

Isotopes of an element have a different number of...

Back

Neutrons

Front

In a chemical reaction, the number of atoms in the products will always equal which amount?

Back

the number of atoms in the reactants

Front

Which elements are to the right of the zig zag?

Back

nonmetals

Front

What nuclear process occurs in the sun?

Back

fusion

Front

What is the definition of valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is the difference between isotopes and regular atoms?

Back

Isotopes have the same number of protons but different numbers of neutrons.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

Front

What are nonmetals?

Back

Elements that are typically poor conductors of heat and electricity and are found to the right of the zig-zag line on the periodic table.

Front

What is nuclear fusion?

Back

A process where two light atomic nuclei combine to form a heavier nucleus, releasing energy, as occurs in the sun.