1.
3 valentli element 8 harfdan iborat
2.
1 valentli element 7 harfdan iborat
3.
o'zgaruvchan 1 va 2 valentli element
4.
o'zgaruvchan 2 va 3 valentli element
5.
tartib raqami 23 bo'lgan element
6.
elektron soni 8 ga teng bo'lgan element
7.
atom massasi 55 ga teng bo'lgan element
8.
o'zgarmas 2 valentli element 8 harf
9.
1 valentli element 4 harf
10.
1,2,3,4 valentli element
12.
3 va 5 valentli element 5 harf
13.
1 va 3 valentli element
14.
2 valentli element 6 harf
15.
1,3,5,7 valentli element 4 harf
16.
atom massasi 23 ga teng element
17.
19 ta protoni bor bo'lgan element
18.
2 va 4 valentli element 7 harf
19.
2,4,6 valentli element 11 harf
20.
atom massasi 58 ga teng bo'lgan element
