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Chemistry > Periodicity And Chemical Classification > Flashcards

Periodicity And Chemical Classification Flashcards

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1
Q

Modern periodic law.

A

The properties of elements are periodic properties of their atomic numbers.

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2
Q

Number of groups in modern periodic table.

A

18 groups.

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3
Q

Number of periods in the modern periodic table.

A

7 periods.

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4
Q

Alkaline Earth Metals.

A

Be Mg Ca Sr Ba Ra

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5
Q

Boron Family

A

B Al Ga In Tl

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6
Q

Carbon Family

A

C Si Ge Sn Pb

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7
Q

Nitrogen Family

A

N P As Sb Bi

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8
Q

Oxygen Family

A

O S Se TE Po

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9
Q

Halogen Family

A

F Cl Br I At

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10
Q

Noble gas family

A

He Ne Ar Kr Xe Rn

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11
Q

What are p block elements ?

A

Last electron gets filled in p-orbital. Excluding He , number of p block elements are 30. Gallium and Bromine are liquids.

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12
Q

What are d block or transition elements ?

A

Last electron gets filled in d orbital. All elements of d block are metals. Except Mercury. There are 33 d block elements but there are only 30 transition elements.

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13
Q

What are f block elements ?

A

Last electron gets filled in f orbital.

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14
Q

Value of shielding effect of electrons of 1s orbital.

A

0.30

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15
Q

Shielding effect of each electrons of ns and np. ( electrons of the outermost orbital )

A

0.35

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16
Q

Shielding effect of each electron s , p or d orbitals of the penultimate shell (n-1)?

A

0.85

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17
Q

Van der waals radius.

A

Half the distance between the nuclei of two non binder atoms belonging to two different molecules closest to one another.

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18
Q

What are the atomic radii of inert gases measured in ?

A

The value of atomic radii in noble gases are always ditermined as van der waal radius.

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19
Q

Exception regarding second ionisation potential of Be and B and Mg and Al.

A

The second I.P of Be is greater than B, and the third I.P of Mg is greater than Al due to high stability of fully filled orbitals.

20
Q

Exception regarding second I.P of N and O and third I.P of P and S.

A

In second I.P of N is greater than O and third I.P of P is greater than S due to stability of half filled orbitals.

21
Q

Exception regarding I.P of increasing order of second period elements.

A

Li<b></b>

22
Q

Exception regarding I.P of third period elements.

A

Na

23
Q

Element in the periodic table having highest I.P

A

He

24
Q

Order of second I.P of C N O and F.

A

C

25
Q

Exception regrading electron affinity of C and N.

A

On going from C to N in second period , the value of EA decreased instead of increasing.

26
Q

Exception regarding value of EA of Si and P.

A

In the third period , value of EA of Si is greater than P. This is because outermost orbit of P is half filled, is relatively more stable.

27
Q

Value of EA of noble gases

A

0

28
Q

Exception regarding EA of F and Cl

A

The value of electron affinity of F is lower than that of Cl. Ea of Cl is highest in periodic table.

29
Q

Difference in electronegativity between two elements for being basic, acidic or amphoteric?

A

For difference is 2.3 or more, oxide is basic. If value is lower than 2.3 then first amphoteric then acidic in nature.

30
Q

Difference between the electronegativity of two elements regarding their bonding type.

A

For difference of electronegativity is more than 1.7, then ionic bond is formed , if less than 1.7 then covalent bond is formed.

31
Q

Liquid non metal.

A

Br

32
Q

Liquid metal.

A

Hg, Ga, Cs and Fr

33
Q

Solid volatile non metal.

A

Iodine.

34
Q

Lightest metal.

A

Li

35
Q

Heaviest metal

A

Ir

36
Q

Most abundant element in earth

A

Al

37
Q

Element with lowest electronegativity.

A

Cs

38
Q

Highest electronegativity

A

F

39
Q

Element with highest Ionisation potential

A

He

40
Q

Element with lowest ionisation potential

A

Cs

41
Q

Element with highest electron affinity

A

Cl

42
Q

Elements which are bridge metals

A

Na and Mg

43
Q

Lightest element

A

H

44
Q

Periodicity of oxidising nature.

A

Oxidising nature increases across the period and decreased down the group.

45
Q

Periodicity or reducing nature.

A

Reducing nature decreases along the period and increases down the group.

46
Q

Periodicity of effective nuclear charge.

A

Increases across the period and remains constant down the group.

Chemistry (20 decks)

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