Which of the following best describes an atom?

The smallest unit of an element that retains its properties

A substance that can be seen with the naked eye

A type of molecule made of several elements

Which statement accurately describes neutrons?

Neutrons have no electrical charge

Neutrons are the same as electrons

Neutrons are positively charged

Neutrons are found outside the nucleus

The number of protons in the nucleus

The number of electrons in an atom

Electrons occupy energy levels or shells around the nucleus

Electrons are fixed in place within the nucleus

Electrons are found randomly throughout the nucleus

Electrons are clustered only at the center of the atom

They have different numbers of neutrons

They are found in different states of matter

They have different numbers of protons

It transforms into a different element