| સમૂહ $\to$ | $16$ | $17$ | $18$ |
| આવર્ત $1$ | $A$ | ||
| આવર્ત $2$ | $B$ | $C$ | $D$ |
| આવર્ત $3$ | $E$ | $F$ | $G$ |
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| બીજા આવર્તના તત્વો | $B$ | $Be$ | $O$ | $N$ | $Li$ | $F$ | $C$ |
| પરમાણ્વીય ત્રિજ્યા $(pm)$ | $88$ | $111$ | $66$ | $74$ | $152$ | $64$ | $77$ |
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