Classification of Elements and Periodicity in Prop
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New answer posted
a month agoContributor-Level 10
Among isoelectronic monoatomic species, size is inversely proportional to atomic number. Hence among isoelectronic species Na? , O²? , N³? , F? (having the nearest noble gas configuration);
Order of size is Na? < F? < O? < N?
N³? has least atomic number hence the largest size
New answer posted
a month agoContributor-Level 10
Electron gain enthalpy increases with electro negativity chlorine has higher electron gain enthalpy than fluorine (exception)
New answer posted
a month agoContributor-Level 10
In isoelectronic species nuclear charge can be approximated as
Nuclear charge ≈ z / no. of electrons
Al³? Mg²? Na? F? O²? N³?
Nuclear Charge: 13/10 12/10 11/10 9/10 8/10 7/10
Minimum nuclear charge is in N³? and maximum is in Al³?
So order should be
Al³? < Mg? < Na? < F? < O? < N?
New answer posted
2 months agoContributor-Level 10
Wt of liquid = 135 – 40 = 95 gm
Volume of liquid =
Hence volume of vessel = 100 ml = 0.1 lit from ideal gas equation,
New answer posted
2 months agoContributor-Level 10
General valence shell electronic configuration of group 16 elements is ns2np4. For 3rd period element which is above element “E” is 3s23p4
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3 months agoNew answer posted
3 months agoContributor-Level 10
(a) The element V has the highest first ionization enthalpy (? iH1) and positive electron gain enthalpy (? egH) and hence it is the least reactive element. Since inert gases have positive? egH, therefore, the element-V must be an inert gas. The values of? iH1, ? iH2 and? egH match that of He.
(b) The element II which has the least first ionization enthalpy (? iH1) and a low negative electron gain enthalpy (? egH) is the most reactive metal. The values of ? iH1, ? iH2 and? egH match that of K (potassium).
(c) The element III which has high fi
New answer posted
4 months agoContributor-Level 10
This is a Matching Type Questions as classified in NCERT Exemplar
i d + 48
ii a &n
New question posted
4 months agoTaking an Exam? Selecting a College?
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