Question

Element X forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of the periodic table as:​

Answer 1

Answer: Hello.

Explanation:-u + v = 80 cm -------(1)

m = -3 (The image is real, since it form on a screen)

m = v/u =- 3

v = -3u

-u – 3u = 80

-4u = 80

U = - 20 cm

Distance of lens from filament is 20 cm

V = - 3u = 60 cm

Lens formula: 1/v – 1/u = 1/f

1/60 – 1/-20 = 1/f

1/f = (1 + 3)/60 = 4/60

f = 15 cm

Answer 2

here X is Magnesium Mg because it have valency 2 and in the same group of the periodic