i. Predict my group. My characters are
a. electrons in my hand are just enough for me.
b. I am a gas.
c. At ordinary temperature and pressure, I dont like to react with other gases.
ii. Sodium is an element in the first group. Write the ğeneral characters of this element.

The physical and chemical properties of elements are periodic functions of their atomic numbers. a) The atomic number of an element 'X' is 19. Write the group number, period and block to which 'X' belong in the periodic table. b) Name the element with i) highest electronegativity and ii) highest electron gain enthalpy

Find the true statement/statements i. Delta_(eg)H is related to electron affinity (Ae) as per the equation Delta_(eg)H=-[Ae+5/2RT] ii. At absolute zero temperature, EGE and A_(e) are the same. iii. Delta_(eg)H_(2) of a number of elements is +ve. iv. Delta_(eg)H_(1) of Be, Mg, N and noble gases are -ve. v. A higher -ve value of Delta_(eg)H_(1) shows a higher electron affinity, but not always. vi. Delta_(eg)H_(1) is of N, O, F and Ne have a relatively lower -ve values as compound with the next group member. vii. Group 14 elements (except lead) have a higher -ve value of Delta_(eg)H_(1) compound with group 15 elements.

a) I am and unsaturated hydrocarbon. b) My wordroot is pent. c) My suffix is ene. The double bond lies between 2nd and 3rd carbon atoms. d) I have a branch of methyl group on my second carbon atom. Who am I…?

Based on the hints given, find out the atomic numbers and write down the subshell electronic configuration of elements (Symbol and not real) i) A - period 3, group 6 ii) B - period 4, group 6