Question

how to determine a valency of an element

Answer 1

the valency of an element the number of atoms lost and gained by atom of an element.
OR
Combining capacity of an atom known as valency

Answer 2

ANSWER
................



1. Valency is a measure of the reactivity of an atom or molecule.


2. You can derive the valency of many elements by looking at their positions in the periodic table,


3. but this isn't true for all of them. It's also possible to calculate the valency of an atom or molecule

4. by noting how it combines with other atoms or molecules with known valencies.


All ELEMENT VALENCY

Hydrogen
➡️ 1.00794

Helium
➡️ 4.002602

Lithium
➡️ 6.941


Beryllium
➡️ 9.012182

Boron
➡️ 10.811

6
Carbon
12.0107
N
7
Nitrogen
14.0067
O
8
Oxygen
15.9994
F
9
Fluorine
18.9984032
Ne
10
Neon
20.1797
Na
11
Sodium
22.98976...
Mg
12
Magnesium
24.305
Al
13
Aluminum
26.9815386
Si
14
Silicon
28.0855
P
15
Phosphorus
30.973762
S
16
Sulfur
32.065
Cl
17
Chlorine
35.453
Ar
18
Argon
39.948
K
19
Potassium
39.948
Ca
20
Calcium
40.078
Sc
21
Scandium
44.955912
Ti
22
Titanium
47.867
V
23
Vanadium
50.9415
Cr
24
Chromium
51.9961
Mn
25
Manganese
54.938045
Fe
26
Iron
55.845
Co
27
Cobalt
58.933195
Ni
28
Nickel
58.6934
Cu
29
Copper
63.546
Zn
30
Zinc
65.38
Ga
31
Gallium
69.723
Ge
32
Germanium
72.63
As
33
Arsenic
74.9216
Se
34
Selenium
78.96
Br
35
Bromine
79.904
Kr
36
Krypton
83.798
Rb
37
Rubidium
85.4678
Sr
38
Strontium
87.62
Y
39
Yttrium
88.90585
Zr
40
Zirconium
91.224
Nb
41
Niobium
92.90628
Mo
42
Molybdenum
95.96
Tc
43
Technetium
(98)
Ru
44
Ruthenium
101.07
Rh
45
Rhodium
102.9055
Pd
46
Palladium
106.42
Ag
47
Silver
107.8682
Cd
48
Cadmium
112.411
In
49
Indium
114.818
Sn
50
Tin
118.71
Sb
51
Antimony
121.76
Te
52
Tellurium
127.6
I
53
Iodine
126.90447
Xe
54
Xenon
131.293
Cs
55
Caesium
132.9054
Ba
56
Barium
132.9054
Hf
72
Hafnium
178.49
Ta
73
Tantalum
180.94788
W
74
Tungsten
183.84
Re
75
Rhenium
186.207
Os
76
Osmium
190.23
Ir
77
Iridium
192.217
Pt
78
Platinum
195.084
Au
79
Gold
196.966569
Hg
80
Mercury
200.59
Ti
81
Thallium
204.3833
Pb
82
Lead
207.2
Bi
83
Bismuth
208.9804
Po
84
Polonium
(209)
At
85
Astatine
(210)
Rn
86
Radon
(222)
Fr
87
Francium
(223)
Ra
88
Radium
(226)
Rf
104
Rutherfordium
(267)
Db
105
Dubnium
(268)
Sg
106
Seaborgium
(271)
Bh
107
Bohrium
(272)
Hs
108
Hassium
(270)
Mt
109
Meitnerium
(276)
Ds
110
Darmstadium
(281)
Rg
111
Roentgenium
(280)
Cn
112
Copernicium
(285)
Uut
113
Unutrium
(284)
Uuq
114
Flerovium
(289)
UuP
115
Ununpentium
(288)
Lv
116
Livermorium
(293)
Uus
117
Ununseptium
(294)
Uuo
118
Ununoctium
(294)
La
57
Lanthanum
138.90547
Ce
58
Cerium
140.116
Pr
59
Praseodymium
140.90765
Nd
60
Neodymium
144.242
Pm
61
Promethium
(145)
Sm
62
Samarium
150.36
Eu
63
Europium
151.964
Gd
64
Gadolinium
157.25
Tb
65
Terbium
158.92535
Dy
66
Dysprosium
162.5
Ho
67
Holmium
164.93032
Er
68
Erbium
167.259
Tm
69
Thulium
168.93421
Yb
70
Ytterbium
173.054
Lu
71
Lutetium
174.9668
Ac
89
Actinium
(227)
Th
90
Thorium
232.03806
Pa
91
Protactinium
231.0588
U
92
Uranium
238.02891
Np
93
Neptunium
(237)
Pu
94
Plutonium
(244)
Am
95
Americium
(243)
Cm
96
Curium
(247)
Bk
97
Berkelium
(247)
Cf
98
Californium
(251)
Es
99
Einstenium
(252)
Fm
100
Fermium
(257)
Md
101
Mendelevium
(258)
No
102
Nobelium
(259)
Lr
103
Lawrencium
(262)