PLEASE FILL IN THE BLANKS! IF YOU NEED THE PERIODIC TABLE MY IS nevaeh_rose0​

Explanation:

Manganese, Mn, 25, 25, 55

Sodium, Na, 11, 12, 11, 23

Bromine, Br, 35, 35, 80

Yttrium, Y, 39, 39, 50

Arsenic, As, 33, 42, 33

Actinium, 89, 89, 138, 89

Na, 11, 11, 12, 11, 23

Tantalum, 73, 73, 108, 73, 181

Lead, Pb, 82, 82, 125, 82, 209

Mercury, Hg, 80, 121, 80, 201

Osmium, Os, 76, 114, 76, 190

Radon, Rn, 86, 136, 86

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