Practice free Classification of elements and Periodicity in properties (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The outermost electronic configuration of the most electronegative element is :
(c) It belongs to general outer electronic configuration of halogens which are most electronegative elements.
The elements X, Y, Z and J have the indicated electron configurations starting with the innermost shell. The most metallic element is :
(c) The metallic character is maximum in I gp. elements.
Which statement is true?
EN increase along the period
The most non-metallic element among the following is:
(b) Non-metallic character increases along the period and decreases down the gp.
58Ce is a member of:
(d) Elements from atomic number 58 to 71 are f-block elements and are known as Lanthanoids or rare earths.
The screening effect of 'd' electrons is :
(a) Screening effect order for sub-shell is of a shell, s>p>d>f.
Transuranic elements are those which are:
(a) trans means later so complete meaning is after uranium.
correct increasing order of density is:
K is lighter than Na.
k,Ca have lower density than Na,Mg,Because thy (K,Ca) have vacent d subshell,which increase their size.
General electronic configuration of outermost and penultimate shell of an atom is
(n - 1)s2 (n - 1) p6 (n - 1)dx ns2. If n = 4 and x = 5, the number of proton in the nucleus is:
(c) It is 1s2 ,2s22p6 ,3s23p63d5 ,4s2 , i.e.,
The maximum number of valency electrons possible for atoms in the second period of the periodic table is:
(c) Last element of second period is Ne which has 8 valence electrons.
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