Question

CHEMISTRY CINJEUNEET-OLYMPIADS
VI-SYMBOLS AND FOR:
MD Conca Atiyer Type (M.CAT):
15. Which of the following elements exhubit monoatomiaty?
1) Calcium
2) Copper
3) Mercury 4) Ozone
16. Which of the following metais exhubit vanable valency?
Silver
2) Potassium
5) Iron
17. Which of the following elements named as country?
D) Ruthenium
2) Califomium
3) Fernium 4) Berkein
18. Which of the following clements are name of the scienuses?
1) Mendalces
2) Germanium
3) Nobelrum
*) Einstes
Statomas Typs (5.7):
4) Lead​

Answer 1

Explanation:

hdxhdhjdfirur7e6uencnxeyeur7hd