Element P has atomic number 19.To which group and period, does P belong ? Is it a metal or a non-metal ? Why ?
Atomic number: 19
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s1
4s means it is comes under fourth period and s1 means it is first group.
It is a metal (Potassium, specifically). It is classified as such because it forms metallic bonds - Layers of positively-charged ions surrounded by a “sea” of delocalised electrons