Answer is Mr and S as MgS ..
The number of protons an element has is the same as the atomic number, so the element would have 86 protons.
Answer:
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Explanation:
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.