Wallace Mid-term study guide

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 are in an atom of beryllium?

Back

4

Front

What is the significance of the period number in the Periodic Table?

Back

The period number indicates the highest energy level of electrons in an atom of the element.

Front

How many outermost electrons does an element in Period 4 have if it has 28 innermost electrons?

Back

7 outermost electrons.

Front

Which sublevel has the highest energy: 4p, 4s, 4d, or 4f?

Back

4f has the highest energy.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

Which element in Period 3 has the highest first ionization energy?

Back

Argon (Ar) has the highest first ionization energy in Period 3.

Front

What are isotopes?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What must be the same for isotopes of the same element?

Back

Isotopes must have the same atomic number.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.