Atomic Structure & Isotopes

Front

What is the electric charge of an electron?

Back

Electrons have a negative electric charge.

Front

How many protons are in a carbon isotope with an atomic number of 6?

Back

There are 6 protons in a carbon isotope.

Front

What do isotopes of the same element have in common?

Back

Isotopes of the same element have the same atomic number and the same number of electrons.

Front

What are the three subatomic particles found in an atom?

Back

The three subatomic particles are protons, neutrons, and electrons.

Front

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

Back

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

Front

What is the mass number of an atom?

Back

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

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 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.

Front

How many neutrons are in the isotope of copper with a mass number of 69?

Back

The number of neutrons in the copper isotope with a mass number of 69 is 40 (69 - 29 = 40, where 29 is the atomic number of copper).

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.