Unit 1, Practice 1 - Counting Protons, Neutrons, and Electrons

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 calculate the number of neutrons in an atom?

Back

The number of neutrons can be calculated by subtracting the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number).

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

Where are neutrons located in an atom?

Back

Neutrons are located in the nucleus of an atom.

Front

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

Back

A neutron has a mass approximately equal to that of a proton.

Front

What is the role of electrons in an atom?

Back

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

Front

How many protons are in a neutral atom of an element?

Back

In a neutral atom, the number of protons is equal to the number of electrons.

Front

What is the significance of the periodic table in relation to protons, neutrons, and electrons?

Back

The periodic table organizes elements by increasing atomic number, which corresponds to the number of protons.

Front

What is an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.