Atomic Structure and the Periodic Table

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

What are the three main subatomic particles?

Back

The three main subatomic particles are protons (positive charge), neutrons (no charge), and electrons (negative charge).

Front

Where are protons located in an atom?

Back

Protons are located in the nucleus of an atom.

Front

What is the charge of an electron?

Back

Electrons have a negative charge.

Front

What is the mass of a neutron compared to a proton?

Back

Neutrons and protons have approximately the same mass, but neutrons are slightly heavier.

Front

What does the periodic table organize?

Back

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

Front

What is a period in the periodic table?

Back

A period is a horizontal row in the periodic table, indicating elements with the same number of electron shells.

Front

What is a group in the periodic table?

Back

A group is a vertical column in the periodic table, indicating elements with similar chemical properties.

Front

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

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is the significance of Mendeleev's periodic table?

Back

Mendeleev arranged the elements by atomic mass and predicted the properties of undiscovered elements.