2 H
He
3 4
5
6
7 8
10
Li Be
B с N o F Ne
metal
12
11
metalloid nonmetal unknown
13 14 15 16 17 18
Na Mg
Al si P S Cl Ar
19 20 21 22 23 24 25
28
28 29 30 31 33 34 35 38
K Ca Sc Ti v Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
37 38 39 40
44 45 46 47 48 49 50 3152 53 54
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
55 56 72 73 74 75 76 77 78 79 80 81 82 83
85 86
Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
27
5
Select the correct answer.
Based on the reactivities of the elements involved, which reaction will form products that are more stable than the reactants?
OA 2A1Brz + 3n - 3ZnBr2 + 2A
OB. Caßr2 + 2Na - 2NaBr + Ca
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