| ત્રિપુટી ક્રમ | તત્વો અને પરમાણ્વીય દળ | $1^{st}$ અને $3^{rd}$ તત્વની સરેરાશ |
| $(1)$ | $Li(7), Na(23), K(39)$ | $(7+39) / 2 = 23$ |
| $(2)$ | $Ca(40), Sr(88), Ba(137)$ | $(40+137) / 2 = 88.5$ |
| $(3)$ | $Cl(35.5), Br(80), I(127)$ | $(35.5+127) / 2 = 81.25$ |
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| તત્વ | $Li$ | $Na$ | $Cl$ | $K$ | $Ca$ | $Br$ | $Sr$ | $I$ | $Ba$ |
|---|---|---|---|---|---|---|---|---|---|
| પરમાણ્વીય દળ $(g \cdot mol^{-1})$ | $7$ | $23$ | $35.5$ | $39$ | $40$ | $80$ | $88$ | $127$ | $137$ |
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