The Periodic Table — CHEMISTRY STD 9 — Question

Name the gases which Turn moist red litmus blue.

Normally, solubility of crystalline solid increases with temperature. Does it increase uniformly in all cases? Name a substance whose solubility:
Initially increases then decreases with rise in temperature.

In which part of a group would you separately expect the elements to have the largest atomic size?

Name the first three alkaline earth metals.

State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate

Identify the gases from the observations:
A colourless gas which fumes strongly in air and has a sharp smell. It gives dense white fumes with a glass rod dipped in conc. HCl.

This question refers to elements of the periodic table with atomic numbers from 3 to 18. In the table below, some elements are shown by letters, even though the letters are not the usual symbols of the elements.

3	4	5	6	7	8	9	10
A	B	C	D	E	F	G	H
11	12	13	14	15	16	17	18
I	J	K	L	M	N	O	P

What is the electronic configuration of G?

Name and state the following with reference to the elements of the first three periods of the periodic table.
Bridge elements of Period 3 of Group 1,2and 3.