Atomic Structure (Part 1)

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 subatomic particles are found in the nucleus of an atom?

Back

The nucleus contains protons and neutrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

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

Back

A neutron has approximately the same mass as a proton, but it is neutral.

Front

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

Back

Subtract the atomic number from the atomic mass (rounded to the nearest whole number).

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and determine the atom's reactivity.

Front

What is an isotope?

Back

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

Front

What is the significance of the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, reflecting the relative abundance of each isotope.

Front

What determines the identity of an element?

Back

The number of protons in the nucleus determines the identity of an element.