Front

What is the mass number of an atom?

Back

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

Front

What are periods on the periodic table?

Back

Periods are horizontal rows on the periodic table.

Front

How do you determine the period of an element?

Back

The period of an element is determined by its row in the periodic table, indicating the number of energy levels.

Front

What is a Bohr model?

Back

A Bohr model is a diagram that represents an atom with electrons in defined energy levels around the nucleus.

Front

How many energy levels does magnesium have?

Back

Magnesium has 3 energy levels.

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 do you find the number of neutrons in an atom?

Back

The number of neutrons can be found by subtracting the atomic number from the mass number.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is the electron configuration of magnesium?

Back

The electron configuration of magnesium is 1s² 2s² 2p⁶ 3s².

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a net charge due to the loss or gain of electrons.