In which pair, the first atom or ion is not larger than the second?
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The IP1,IP2,IP3,IP4 and IP5 of an element are 7.1, 14.3,34.5,46.8,162.2,eV respectively. The element is likely to be:
The electronic configuration of four elements L,P,Q and R are given below, (a)L=1s2,2s22p4 (b) Q=1s2,2s22p6,3s23p5 (c) P=1s25,2s22p6,3s1 (d) R=1s2,2s22p6,3s2
The formula of the ionic compounds that can be formed between these elements are:
Which of the following characteristics regarding halogens is not correct?
Which one of the following elements has lower value of ionisation energy?
The electronegativity of the following elements increases in the order
If the ionic radii of K+ and F- are about 1.34 each, then the expected values of atomic radii of K and F should be respectively:
If the ionization potential for hydrogen atom is 13.6 eV, then the ionzation potential for He+ ion should be:
The energy relased when a neutral gaseous atom takes up an electron is called:
On moving from left to right across a period in the table the metallic character
Which one pair of atoms or ions will have same configuration?
The element having lowest ionisation energy among the following is:
Which of the following oxides is not expected to react with sodium hydroxide?
Amongst the elements with following electronic cinfigurations,which one of them may have the highest ionization energy?