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Chemistry > Classification of Elements and Periodicity in Properties > Flashcards

Classification of Elements and Periodicity in Properties Flashcards

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1
Q

What is the modern periodic law?

A

The physical and chemical properties of the elements are periodic functions of their atomic numbers

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2
Q

What is meant by electronic configuration of an atom?

A

The electronic configuration of the atom represents how the electrons are distributed in its atom among the orbits (shells) and subshells

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3
Q

Define Dobereiner’s Law of trIAds

A

It deal with putting three elements in order of atomic weights. The average of the first and third elements atomic mass is the atomic mass of second element
lithium 6.94
sodium 22.99
potassium 39.1

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4
Q

Atomic weight of Li is?

A

7

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5
Q

Atomic weight of Be is?

A

9

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6
Q

Atomic weight of B is?

A

11

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7
Q

The formula of oxide and chloride of Eka aluminium is ____ and _____ respectively

A

E2O3, ECl3

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8
Q

The formula of oxide and chloride of gallium is ____ and _____ respectively

A

Ga2O3, GaCl3

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9
Q

The formula of oxide and chloride of Eka silicon is ____ and _____ respectively

A

EO2, ECl4

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10
Q

The formula of oxide and chloride of germanium is ____ and _____ respectively

A

GeO2, GeCl4

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11
Q

What are the properties of a group in periodic table?

A

The s, p and d-elements of the periodic table are arranged into 18 numbered columns or groups. The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.

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12
Q

What do you mean by subatomic particles?

A

A subatomic particle is a particle smaller than an atom. It is a unit of matter or energy that’s the fundamental makeup of all matter

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13
Q

What did henry Moseley discover?

A

According to moseley, similar properties recur periodically when elements are arranged according to increase atomic number. Atomic numbers, not weights, determine the factor of chemical properties

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14
Q

What is the IUPAC name and symbol of atmic number 101?

A

IUPAC name - Unnilunium
Mendelevium symbol - Unu

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15
Q

What is the IUPAC name and symbol of atmic number 102?

A

IUPAC name - Unnilbium
symbol - Unb

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16
Q

Modern periodic law was proposed by

A

Moseley

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17
Q

The position of the element _____ is still controversial in the periodic table

A

Hydrogen

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18
Q

Which one is the typical element

A

Na

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19
Q

____ periods and _____ groups are present in the long form of the periodic table

A

7 and 9

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20
Q

Number of elements in the second and third period respectively are

A

8,8

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21
Q

Which is not a pair of representative element
(a) Pr, Co (b) Sr, Cs
(c) S, K (d) P, Cl

A

Pr, Co

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22
Q

Y to Cd belongs to

A

4d series

23
Q

General configuration of inner transition elements is

A
24
Q

The atomic number of Sn is 50, what would be the atomic number of the elements occupying position above and below in the group

A

32, 82

25
Q

Outer configuration of an element is ns2np4. This is true for

A

Oxygen

26
Q

Light element is

A

Li

27
Q

Z = 13,38,4,98. In this group separate the elements belonging to the same group of periodic table

A

12, 38, 4

28
Q

Number of elements present in VIII group are

A

9

29
Q

The tendency to lose electrons is maximum for the element
(a) Be (b) B (c) Rb (d) Mg

A

Rb

30
Q

Element having least first ionization potential is
(a) Na (b) Cs (c) K (d) Rb

A

Cs

31
Q

Which element has the positive electron affinity
(a) Cl (b) C (c) Be (d) O

A

Be

32
Q

4s1 is the configuration of ultimate shell in its ground state. The element should be

A

Cu

33
Q

Boron shows diagonal relationship with element having atomic number

A

14

34
Q

Which element has the highest electron affinity
(a) O (b) S (c) F (d) Cl

A

Cl

35
Q
A

3

36
Q

Number of protons in the third alkaline earth metal are

A

20

37
Q

The element with maximum number of unpaired 3p electrons

A

P

38
Q

The heaviest atom is
(a) Ra (b) U (c) Pb (d) Hg

A

U

39
Q

Chloride of which element shows minimum ionic character
(a) Ca (b) Be (c) Mg (d) Sr

A

Be

40
Q

Maximum size will be of
(a) Br (b) I- (c) I (d) F

A

I-

41
Q

True position of lanthanides are

A

After IIIB group and in the 6th period

42
Q

Element with atomic number 35 belongs to

A

p block

43
Q

Elements with atomic number 47 is

A

d-block

44
Q

V B group elements are N, P, As, Sb, Bi. As we move down the group the oxide at the end would become

A

Basic

45
Q

Electronic configuration of M-shell of phosphorous in its ground state would be

A

3s2 3p3

46
Q

ns2np4 (n-outermost orbit) represents the valency electrons. The corresponding group would be

A

O, S, Se..

47
Q

Electronic configuration of penultimate orbit of the elements with Z = 87

A

6s2 6p6

48
Q

Keeping energy levels in mind, the configuration of element having Z= 28

A

2, 8, 16, 2

49
Q
A
50
Q
A
51
Q

Which of the following is not a doberiner traid?
(a) Li, Na, K (b) Mg, Ca, Sr

A

b

52
Q

Which of the following obeys Newlands octane ?
(I) F, Cl, Br (II) Be, Mg, Ca

A

C

53
Q

Eka aluminium - ____
Eka maganese - ____

A

Eka aluminium - Ga
Eka maganese - Tc

54
Q

The places left empty by

A

Chemistry (4 decks)

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