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what is diagonal relationship?explain its causes.
pls.explain why fluorine has less negative electron gain enthalpy than chlorine.
what is penultimate shell
Why do we need to classify elements?
HOW WOULD YOU JUSTIFY THE PRESENCE OF 18 ELEMENTS IN THE FIFTH PERIOD OF THE PERIODIC TABLE?
explain the electron gain enthalpy?
oxidation state and covalency of aluminium in (AlCl(H2O)5)+2 are same or differrent? justify
what is ionization enthalpy
what is the difference between valency and covalency.
Difference between Electronegativity and Electron Gain Enthalpy..??
Explain the diagonal relation ship between Li and Mg
Is there any trick 2 learn periodic table?
please explain why chlorine is more electonegative than flourine however in p-block metallic character increses? please don't repeat the same answer.
What is electron gain enthalpy?How does it vary in group and period?explain.
Consider the following species :
N3-, O2-, F-, Na+, Mg2+ and Al3+
(a) What is common in them?
(b) arrange them in the increasing ionic radii?
what is differentiating electron
Mg2+ ion is smaller than O2- ion although both have same electronic configuration..why??
WHICH HAS HIGHER LATTICE ENTHALPY AND WHY?
MgO AND NaCl
define strength of a solution?
Are the oxidation state and covalency of Al in [AlCl(H2O)6]2+ same??
Out of Na and Na+ which one has larger size and why?
Which is stable O22+ or O22-, And Why ?
The electron gain enthalpy values of halogens become more negative in the order F>Cl>Br>I.
Comment on this statement
What is meant by Unipositive and Dipositive ion?
How to calculate screening constant for a given element ????
What is meant by penetration effect of the electrons?
why o has lower ionisation enthalpy than N and F?
why does cl have more negative electron gain enthalpy than F ?
Why are f-block elements called "Inner-transition elements" ?
Why group 1 elements are called alkali metals?Why Group 2 elements are called alkali earth metals?
The order of first electron affinity of O , S and Se :-
(A) O>S>Se (B) S>Se>O (C) Se>O>S (D) S>O>Se
nitroge has positive electron gain enthalpy whereas oxygen has negative,however oxygen has lower ionization enthalpy than nitrogen.explain.
Arrange the following ions in the order of increasing size.
Be2+, Cl- ,S2- ,Na+, Mg2+,Br-
Also please explain why?
why group 17 elements called halogens...
Electron gain enthalpy of Oxygen and Fluorine is less negative than suceeding element S and Cl. Why?
what is polarising power?
What is Covalency?How to find the covalency of any element
why is second ionization enthalpy greater than first ionization enthalpy?pls.explain
neon has got more atomic radius than flourine.How?
Explain why halogens have maximum electron gain enthalpy in their respective periods.
what are typical elements and how do they differ from transision elements
CH4 , H2O , NH3 order of increasing bond angle around central atom
FULL FORM OF METAL
what is dsp 2 hybridization
How does atomic radius vary in a period and in a group ? How yoy explain the variation ?
how to calculate covalency?
how we can learn periodic table fast n easily ????????plz give me ur suggstions frzzzzz
the first ionisation energy of nitrogen is greater then that of oxygen , whereas the second ionisation energy of oxygen is greater than nitrogen....WHY..??????
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