Identify an element on the periodic table that is chemically similar to boron (b)

The element which is chemically similar to boron is Siicon.

Explanation:

Boron is the 5th element of the periodic table and lies in the 2nd period in the periodic table.

Boron pairs up with silicon to show a diagonal relationship. This relationship exists between few pairs of the elements present in period 2 and period 3 till atomic number 20.

In this relationship, the chemical properties of the two elements seem to be same.

Boron and silicon both are semiconductor, forms halides which are hydrolyzed in water and both have acidic oxides.

Hence, the element which is chemically similar to boron is Silicon.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-