Which of the following statements does not describe the structure of an atom? ♡Inside the nucleus of an atom are protons and neutrons.

♡Protons are positively charged sub-atomic particles.

♡Electrons are negatively charged sub-atomic particles.

♡Most of the mass of an atom comes from the electrons cloud.

the last one is wrong

Explanation:

wrong : most of the mass of an atom comes from the electrons cloud

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.