Review Atomic Theory/Atoms

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in each atom of the element.

Front

What are isotopes?

Back

Isotopes are atoms of the same element that have different masses.

Front

How many protons are in an atom of Nitrogen-16?

Back

7 protons.

Front

Which atom of these isotopes has 3 protons? (Li)

Back

All of them (Lithium-6, Lithium-7, Lithium-9).

Front

How many protons are in the isotope with atomic number 29?

Back

29 protons.

Front

What is an atom?

Back

An atom is the smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What is the difference between protons and neutrons?

Back

Protons are positively charged particles, while neutrons have no charge.

Front

What is the mass number of an atom?

Back

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

Front

What is the significance of the atomic mass unit (amu)?

Back

The atomic mass unit is a standard unit of mass that quantifies mass on an atomic or molecular scale.

Front

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

Back

Subtract the atomic number from the mass number.