Question

please solve question 9

Answer 1

X - CARBON (C)
Y - OXYGEN (O2)
Z - CARBON DI-OXIDE (CO2)

X - K L 
     2 4

Y - K L
      2 6 

Answer 2

The element X is carbon, Y is oxygen and the compound formed Z is cabondioxide which is a greenhouse gas.

Electronic configuration of carbon is 2, 4
Electronic configurationof oxygen is 2,6


hope it helps...