1. 7.Which of the following is metal and non-metal?
7 3X 3 1 Y 10 9 Z
X is a metal. Electron shell configuration: 2, 1. One valence electron, so metal
Y and Z are non-metals.
Electronic configuration Y : 1. Only one electron. It is hydrogen (non-metal).
Electronic configuration Z : 2, 7. Seven valence electrons. So, non-metal
Y and Z are non-metals.
Electronic configuration Y : 1. Only one electron. It is hydrogen (non-metal).
Electronic configuration Z : 2, 7. Seven valence electrons. So, non-metal