Atomic & Mass Number

Front

What is the atomic number of an atom?

Back

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

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

How is mass number defined?

Back

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

Front

What do isotopes of an element have in common?

Back

Isotopes of an element have the same atomic number (number of protons) but different mass numbers.

Front

How many electrons are in a neutral atom?

Back

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

Front

What is the relationship between atomic number and element identity?

Back

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

Front

What is the difference between protons and neutrons?

Back

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

Front

How do you calculate the mass number of an atom?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number determines the position of an element in the periodic table.

Front

Can isotopes of an element have different chemical properties?

Back

Generally, isotopes have similar chemical properties, but their physical properties may differ.