P
Phosphorus · element 15
Polyatomic Nonmetal · Solid at room temperature
Phosphorus is a chemical element with symbol P and atomic number 15. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but due to its high reactivity, phosphorus is never found as a free element on Earth. Instead phosphorus-containing minerals are almost always present in their maximally oxidised state, as inorganic phosphate rocks.
Key facts
Atomic mass
30.9737619985 u
how heavy one atom is
Phase (room temp.)
Solid
Density
1.823 g/cm³
how tightly packed it is
Period
3
its row in the periodic table
Group
15
its column in the periodic table
Block
P-block
the neighbourhood it lives in
Electronegativity
2.19
how strongly it pulls electrons
Electron configuration
[Ne] 3s2 3p3
where its electrons live
Shells
2 · 8 · 5
electrons in each layer, inside to out
Discovered by
Hennig Brand
who found it
Appearance
colourless, waxy white, yellow, scarlet, red, violet, black
what it looks like
Source: Wikipedia