Which of the following statements about elements and atoms is true? Atoms are the smallest unit of an element.

Atoms are made of particles called elements.

Elements are made of more than one type of atom.

Elements are changed into atoms by a chemical reaction.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass