Question

property boron (B)

Bonn Property Atomic symbol Additional name(s) atomic composition most stable isotope) Additional isotopes with nuclear composition and natural abundances (by %) Aade Bone stable Molor mass State of matter at room temperature Color and texture temperature Melting point Boiling point Density 10.8110 glmol Solid at room Brown powder 2076°C 3927? 2. 08 g/cm3 | Croup 13 , Penod a 13 259.pl [he] 252 2p' 90 pro 801 kj/mol on the periodic table. Classification on the periodic table Electron configuration (full and noble gas configuration) Atomic radius First ionization energy Common ions (if appropriate) Names and formulas of three compounds containing the element BASO4 BF → Boron CIID Arsenate Boron Trifluoride Other special properties Belz & Born Tetrabromide Boon is an allotropic semi-metal, ie exist by itself in different forms. Boron can

Answer 1

Answer :- Properities of Boron:-

Atomic Symbol : B

Additional Name: Acide Borique, Anhydride Borique. The name boron us derived from Arabic word "burah".

Atomic composition of most stable isotope: Most stable isotope is boron-11 (natural abundance =80.1%). It contains 5 protons, 5 electrons and 6 neutrons.

Additional isotopes with nuclear composition and natural abundance: Boron-10 (natural abundance = 19.9%). Other unstable isotopes also exists.

Molar Mass: 10.811 g/mol

State of matter at rt:  Solid.

Colour and texture: Amorphous boron is brown powder in colour while crystalline boron is black and hard solid.

melting point : 2076 °C ,

Boiling point: 3927 °C

Density:  2.37 g/cm³

Classification on the periodic table: 1st element of  Group 13. Period -2nd. p-block element.

Electronic Configuration:  [He] 2s² 2p¹

Atomic radius: 90 pm

First ionization energy: 801 KJ/mol

Name and formula of three compounds: boron trifluoride (BF3)

B​​​​​​​_{2​​​​​​​}O₃ ( boron oxide)

B​​​​​​​₂H₆ (diborane)

Other special properties:-

Boron is metalloid.

Exists in allotropic forms.

Bad conductor of electricity (semiconductor).

Forms a number of series of hydrides called boranes.

Trihalides of boron are monomeric in structure.

Form only covalent compounds.

Hydroxide of boron B(OH)₃ is weakly acidic.