Front

What is average atomic mass?

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

How do you calculate the number of neutrons in an atom?

Back

Number of Neutrons = Mass Number - Atomic Number.

Front

What is the mass number of an atom?

Back

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

Front

What is an electron configuration?

Back

The distribution of electrons in an atom's orbitals, indicating how electrons are arranged around the nucleus.

Front

What element has the electron configuration 1s2 2s2 2p6 3s2 3p3?

Back

Phosphorus.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configurations, and recurring chemical properties.

Front

How many protons does sulfur have?

Back

16 protons.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is the maximum number of electrons that can occupy the first energy level?

Back

2 electrons.