Teaching NVS TGT 2024 Test Series Chemistry General Principles And Process of Isolation of Elements Metals and Its Ores
The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct?
1
X is a metal
2
Y is a metal
3
Z is a non-metal
4
Y is a non-metal and Z is a metal