• Encyclopaedia
• S
• S-
• S-a
• S-b
• S-c
• S-d
• S-e
• S-f
• S-g
• S-h
• S-i
• S-j
• S-k
• S-l
• S-m
• S-n
• S-o
• S-p
• S-q
• S-r
• S-s
• S-t
• S-u
• S-v
• S-w
• S-x
• S-y
• S-z

S-block

The s-block of the periodic table of elements consists of the first two groups: the alkali metals and alkaline earth metals, plus hydrogen. These elements are distinguished by the property that in the atomic ground state, the highest-energy electron is in an s-orbital. Elements of the s-block are strong reductants.

Related topics