Question

Read the summary below. Choose the answer that BEST fits into the blank to complete the summary.

Answer 1

Answer:

An atom has a nucleus, made up protons and neutrons, which is surrounded by a cloud of electrons.

Explanation:

An atom is the smallest indivisible part of any element that takes place in a chemical reactions.

These are the fundamental building blocks of every element and even compounds.

• There are three known subatomic particles found within an atom.
• Electrons are the negatively charged particles in an atom
• Protons are the positively charged particles of an atom
• Neutrons do not carry any charges.

Both protons and neutrons are located within the tiny space called nucleus at the center of an atom.

Electrons moves round in orbitals at the spaces outside of the nucleus.