Atoms, Ions, and Isotopes

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus made of protons and neutrons, surrounded by electrons.

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net electrical charge.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different mass numbers.

Front

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

Back

To find the number of neutrons, subtract the atomic number (number of protons) from the mass number.

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 many protons does a Neon atom have?

Back

A Neon atom has 10 protons, which is its atomic number.

Front

How many neutrons does a Bromine atom with a mass number of 80 have?

Back

A Bromine atom with a mass number of 80 has 45 neutrons (80 - 35 = 45, where 35 is the atomic number of Bromine).

Front

What is the relationship between mass number and isotopes?

Back

Isotopes of an element have the same atomic number but different mass numbers due to varying numbers 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 and its chemical properties.