atoms

• The number of protons in an atom determines its atomic number and defines the element.
• Protons are positively charged particles found in the nucleus of an atom.
• Neutrons have no charge and are also located in the nucleus of an atom.
• The nucleus is the central part of an atom, containing protons and neutrons.
• Neutrons do not carry any electrical charge (0).
• Neutrons have no charge, but they do have mass.
• Electrons have a negative charge (-1), while protons have a positive charge (+1).
• Ions can combine with other ions to form compounds.
• Chemical reactions involve the formation or breaking of chemical bonds between atoms.
• the mass number is the sum of neutrons and protons in the nucleus of an atom