(1) is den (iv) is efflorescent
Which of the following is a neutral salt?
(1) Na2CO; (ii) Ca(OH)CI (iii) NaCl (iv) (NH4
20.
7
i.
ii.
ASSIGNMENT THEORY
1a.
When a sample of crystalline salt X was exp
What phenomenon was established by X
Suggest two substances which X could be
111.
On heating 5.00g of a fresh sample of Xt
water vapour. Calculate the number of
molecule of x. [H=1.00, O=16.00, Anhy
Classify each of the following as normal​

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."