Boron is a only non metal in group 13 elements.
It is a Metaliod
no chlorine is a non-metal
no
Sodium is a metal (an alkali metal).
It's a metal. More information about it is available on its page on wikipedia.
no it is not a nonmetal. Silicon is a metalloid
1
Boron has 2 shells altogether. 2 electrons on the first one and the remaining three on the second. Altogether boron (B) has 5 electrons.
Sir Humphrey Davy isolated boron in 1808. The first to realize it was an element was probably John Jakob Berzelius. Boron compounds had been known for thousands of years.
because boron is the first and main element in that group.
boron was named boron because of the properties it has