Answer:precisely 1/12 the mass of an atom of carbon-12.
Explanation:The carbon-12 (C-12) atom has six protons and six neutrons in its nucleus. In imprecise terms, one AMU is the average of the proton rest mass and the neutron rest mass.
One characteristic of a lagoon is often: concentrated salt.
Answer:
the energy of the products of the cause of reactants.It's most common with endothermic reaction but vice-versa.
Explanation:
A neutral sodium atom, for example, contains 11 protons and 11 electrons. By removing an electron from this atom we get a positively charged Na+ ion that has a net charge of +1. Atoms that gain extra electrons become negatively charged. A neutral chlorine atom, for example, contains 17 protons and 17 electrons.
