15.
Phosphorus in is 3rd period. So it has 3 electron shells.
As brittle as glass.
Brittle is an adjective. The noun form would be brittleness.
brittle
In humans
they never do
15.
No. Phosphorus is a non-metal
15
It causes plant growth and algae growth
2, 8, 5 [Ne]3s23p3
Phosphorus in is 3rd period. So it has 3 electron shells.
The German alchemist Hennig Brand distilled urine to isolate phosphorus, in 1674 or 1675
As brittle as glass.
Peanut Brittle
peanut brittle