0
Atomic number
Name of element
Valency
1 Hydrogen 1
2 Helium 0
3 Lithium 1
4 Beryllium 2
5 Boron 3
6 Carbon 2, 4
7 Nitrogen 3, 5
8 Oxygen 2
9 Fluorine 1
10 Neon 0
11 Sodium 1
12 Magnesium 2
13 Aluminium 3
14 Silicon 4
15 Phosphorus 3, 5
16 Sulphur 2, 4, 6
17 Chlorine 1, 3, 5, 7
18 Argon 0
19 Potassium 1
20 Calcium 2
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoNumberElementValence1Hydrogen(-1), +12Helium03Lithium+14Beryllium+25Boron-3, +36Carbon(+2), +47Nitrogen-3, -2, -1, (+1), +2, +3, +4, +58Oxygen-29Fluorine-110Neon011Sodium+112Magnesium+213Aluminum+314Silicon-4, (+2), +415Phosphorus-3, +1, +3, +516Sulfur-2, +2, +4, +617Chlorine-1, +1, (+2), +3, (+4), +5, +718Argon019Potassium+120Calcium+2
Wiki User
∙ 13y agoH ,He , Li ,Be ,B ,C,N ,O , F , Ne,Na ,Mg ,Al ,Si , P ,S ,Cl ,Ar ,2 more
Wiki User
∙ 12y agoscandium valency
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Mass number of first 20 elements?
Mass number is term used for isotopes, not for elements. And it is boring to list here all the isotopes of the first 20 elements.
Graph the atomic radii for the first 20 elements?
give me graph paper first!!!!!!!!!!!!!!
What are properties of first 20 elements?
i dk why asking me google it i am dumb
What are the 1st 20 elements of the periodic table made of?
The first twenty elements are made up f different things
Oxidation number for first 20 elements?
H -->+1 He --> 0 Be --> B
What is Algebra usefull in?
Algebra is useful in creating formulaes!
What are the first 20 elements at room temperature?
H
Mass number of first 20 elements?
Mass number is term used for isotopes, not for elements. And it is boring to list here all the isotopes of the first 20 elements.
What are the first 20 elements in the periodic table?
HydrogenHeliumLithiumBerylliumBoronCarbonNitrogenOxygenFluorineNeonSodiumMagnesiumAluminumSiliconPhosphorousSulphurChlorineArgonPotassiumCalciumHope this helped :)
You want to know all formulaes and symbols of element?
Yes please.
Graph the atomic radii for the first 20 elements?
give me graph paper first!!!!!!!!!!!!!!
What are properties of first 20 elements?
i dk why asking me google it i am dumb
Valencies of the first 20 elements?
Period 1 (Elements 1 and 2)1s1 - 1s2Period 2 (Elements 3 - 10)2s1 - 2s22p6Period 3 (Elements 11 - 18)3s1 - 3s23p6Period 4 (Elements 19 and 20)4s1 - 4s2
What are the 1st 20 elements of the periodic table made of?
The first twenty elements are made up f different things
Oxidation number for first 20 elements?
H -->+1 He --> 0 Be --> B
What element of the first eighteen elements has the highest melting point?
Carbon (C) has the highest melting point out of all the elements, and so, as it's in the first 20 elements, it has the highest melting point of the first 20 elements too. Its melting point is 3823K.
Which element has 5 electrons?
Well i think that will be boron according to the first 20 elements.
