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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.
If a certain element has an atomic number 19, the element is:
(b) It has 1s2, 2s2 2p2, 3s2 3p6, 4s1 electron configuration. It has one electron in their outermost shell, hence, have the tendency to lose it.
Which of the following has the least density?
Li has minimum density.
density increases down the grp,exception is Na ,which is having higher density than K.
Eka aluminium and eka silicon are now known as:
(a)
eka was used to indicate element place below in the group. so element below aluminium or element below silicon
An element having the electronic configuration of its atom ns2 np2 should have similar properties to those of:
(b) 6C has electronic configuration 1s2 , 2s2 2p2
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.