Answer and explanation:
The nuclides with the same atomic number, but different mass numbers are isotopes.
So, in this case, each species will have the same atomic number and a different mass number, that will be the same that it is written in the name of the element:
Answer:
Protons
Explanation:
Bromine has 35 protons and is number 35 for example
Answer:
2. All the naturally occurring isotopes of Mg.
Explanation:
You want to know the atomic mass of the magnesium you use in the lab. That’s “natural” magnesium. So, you must use the weighted average of all the naturally occurring isotopes in natural Mg.
1. and 3. are <em>wrong</em>. You won’t get the correct mass for natural Mg if you use only the artificial isotopes for your calculation.
4. is <em>wrong</em>. You must use all the naturally occurring isotopes. The two most abundant isotopes of Mg account for only 90 % of the atoms. If you ignore the other 10 %, your calculation will be wrong.
Energy is released when a new bonds form.
