Atomic Structure

Front

What is atomic mass?

Back

The weighted average mass of an element's isotopes, taking into account their relative abundances.

Front

What is an isotope?

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

How is the nuclear charge of an atom determined?

Back

The nuclear charge is determined by the number of protons in the nucleus, which is equal to the atomic number.

Front

What is the formula to calculate the number of neutrons in an atom?

Back

Number of neutrons = Mass number - Atomic number.

Front

What does Rutherford's gold foil experiment demonstrate about atomic structure?

Back

It shows that atoms consist mostly of empty space, with a small, dense nucleus.

Front

What is the significance of the atomic number?

Back

The atomic number defines the element and is equal to the number of protons in the nucleus.

Front

How do you calculate the atomic mass of an element with multiple isotopes?

Back

Atomic mass = (mass of isotope 1 × relative abundance) + (mass of isotope 2 × relative abundance) + ...

Front

What is the relationship between mass number and atomic number?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the charge of a proton?

Back

A proton has a positive charge of +1.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).