atomic number and atomic mass

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 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

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

Back

Number of neutrons = Mass number - Atomic number.

Front

What are isotopes?

Back

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

Front

What is the relationship between atomic number and element identity?

Back

The atomic number uniquely identifies an element; no two elements can have the same atomic number.

Front

What is the significance of the mass number in chemistry?

Back

The mass number helps in identifying isotopes and understanding the stability of an atom.

Front

What is the atomic number of carbon?

Back

The atomic number of carbon is 6.

Front

What is the mass number of nitrogen-14?

Back

The mass number of nitrogen-14 is 14.

Front

If an atom has 8 protons, what is its atomic number?

Back

The atomic number is 8.

Front

What is the mass number of an atom with 3 protons and 4 neutrons?

Back

The mass number is 7 (3 protons + 4 neutrons).