Chemistry
Identify the following:
(a) An element in period 1 which can be placed in both group 1 and group 17 of the Periodic Table.
(b) The element having electronic configuration 2, 8, 6.
(c) The most electronegative element of period 3.
Related Questions
Give reasons for the following:
(a) Inert gases do not form ions.
(b) Covalent compounds have a low melting and boiling point.
Arrange the following as per the instructions given in the brackets:
(a) Carbon, Fluorine, Beryllium (decreasing order of atomic size)
(b) Sulphuric acid, Phosphoric acid, Acetic acid (increasing order of number of replaceable H atoms per molecule)
(c) Potassium, Lithium, Sodium (increasing order of ionization potential)
Rita was given an unknown salt for identification. She prepared a solution of the salt and divided it into two parts.
- To the first part of the salt solution, she added a few drops of ammonium hydroxide and obtained a reddish-brown precipitate.
- To the second part of the salt solution, she added a few drops of silver nitrate solution and obtained a white precipitate.
Name:
(a) the cation present and
(b) the anion present in the salt given for identification.
Fill in the blanks by choosing the correct answer from the bracket
(a) Carbon tetrachloride is a …………… [polar / non-polar] covalent molecule.
(b) During electrolysis of acidulated water, the gas liberated at the anode is …………… [oxygen / hydrogen].