2.
the molecular substance
3.
is a type of metal in the periodic table
4.
is a type of gas in the periodic
5.
number 26 in the periodic table
6.
number 1 in the periodic table
7.
number 6 in the periodic table
8.
number 11 in the periodic table
9.
number 22 periodic table
10.
number 80 in the periodic table
11.
number 3 in the periodic table
12.
number 20 in the periodic table
13.
number 12 in the periodic table
14.
number 47 in the periodic table
15.
number 79 in the periodic table
