Atomic Structure Practice

Front

What is the mass number defined as?

Back

The mass number is defined as the number of protons and neutrons in an atom.

Front

How can the number of protons in an element be found?

Back

The number of protons in an element can be found by looking up the atomic number.

Front

What does a Carbon-14 isotope contain?

Back

A Carbon-14 isotope contains 6 Protons, 6 Electrons, and 8 Neutrons.

Front

What is the number of protons in the element with atomic number 7?

Back

The element with atomic number 7 contains 7 protons.

Front

How many neutrons does an Oxygen-19 isotope have?

Back

An Oxygen-19 isotope has 11 neutrons.

Front

Define an isotope.

Back

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

Front

What is the atomic number of an element?

Back

The atomic number of an element is the number of protons in the nucleus of an atom.

Front

Explain the difference between protons and neutrons.

Back

Protons are positively charged particles found in the nucleus, while neutrons are neutral particles that also reside in the nucleus.

Front

What is the significance of the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, reflecting both the number of protons and neutrons.

Front

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

Back

To calculate the number of neutrons, subtract the atomic number from the mass number.