Bromine, atomic number 35, belongs to Group 17. How many valence electrons does bromine have in its outermost shell? Refer to the periodic table.

there all right good

explanation:

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explanation:

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates