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valence electrons can be determined by remember the number of electrons in the last shell. this can be done easily like this first ring: 2 second ring: 8 third ring: 8 So if the number is 8 (oxygen) you know there will six valence electrons in the second shell because it will be 2)6) and oxygen will need two more electrons to become stable. or I label the top of my Periodic Table 1 through 8 skipping the transition elements. These numbers can be very helpful. i.e The numbers will represent the number of valence electrons, the normal valency will be what makes it obey octet rule (total of 8) ie Nitrogen is family 5 it will need 3 to make it 8, so normal valency is 3. This is good for all but Hydrogen, because its normal valency is 1. They will also show the charge after ionization (rows 1, 2, and Al the charge will be +1,+2,+3 ; rows 5 through 8, if you minus 8 from the row number you will get the charge, N = -3, O = -2 and so on) This will only get you so far, but in early chemistry it is very helpful. --Cswigert
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoLook at what column it's under and whatever the the column number is you take that number or the last digit of the column number and that's how many valence electrons are there.
For example. An atom under column 1, has 1 valence electron.
An atom under column 16, has 6 valence electrons.
And so on and so forth, but note. This applies to the main elements you'll be looking at and not the transitional elements.
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What are the valencies of the elements of the periodic table?
kuru
Why some elements have variable valencies?
Certain elements combine with other atoms, donating, accepting or sharing electrons in different proportions depending on the nature of the reaction. For example, iron combines with oxygen to form ferrous oxide as well as ferric oxide. In the formation of ferrous oxide, iron exhibits a valency of +2, whereas in ferric oxide, it has a valency of +3. This is termed variable valency
What is the coordination geometry of CoCl2 6H2O?
CoCl2.6H2O has 6 water molecules attached as secondary valencies and 2 chlorine atoms are serving as the primary valencies. The secondary valencies are directional in nature and hence they lead to the geometry of it. The geometry of this compound is Octahedral with cobalt showing a coordination no. of 6.
One important property of an element is its what?
I guess, the most fundamental is their valency. This dictates how many times it can bond to other elements. Elements with the same valency often share similar properties with other elements with the same valency. The periodic table is divided into 8 rows (and a D block). Each of these 8 rows have elements with similar properties, related to their valencies.
What is uranium ions?
Uranium can form in solutions ions with valencies 3,4,5,6.
What are the valencies of the elements of the periodic table?
kuru
How do the periodic properties of the d-block elements compare with those of the main group elements?
The main group elements have fixed valencies but members of the d block have multiple valencies.
Valencies of elements till atomic number 30?
cfvbhm
Why some elements have variable valencies?
Certain elements combine with other atoms, donating, accepting or sharing electrons in different proportions depending on the nature of the reaction. For example, iron combines with oxygen to form ferrous oxide as well as ferric oxide. In the formation of ferrous oxide, iron exhibits a valency of +2, whereas in ferric oxide, it has a valency of +3. This is termed variable valency
Why are elements in the tall columns in the periodic table called representative elements?
Conventionally representative elements are called the chemical elements from the groups 1,2, 13-18. These elements haven't generally variable valencies. The transitions metals are not representative elements.
Valencies of all elements?
The valency of an element refers to the combining power of a given element. The valencies of all the elements is contained in the table of valencies. The valencies of the elements can be obtained by looking at the groups in the periodic table.
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 valencies is vanadium likely to have?
Vanadium has the following valencies: 2, 3, 4 and 5.
What is valency of aluminum borate?
Aluminium borate does not have a valency. borate and aluminium have different valencies as aluminium and borate are separate elements. aluminium's valency is +3 and borates is -3
How many valencies are there in nitrogen?
7
How do you calculate valency of silver nitrate?
Silver Nitrate is a compound. A compound is formed in such a way that its constituent elements share or transfer electrons in order to become stable. So, the valencies are complete. A compound is stable. Only elements have valence electrons.
How do you learn symbols and valencies?
You need to learn the symbols for the elements I am afraid. Start using a Periodic table (see the links below).You could also learn the valencies but if you know the periodic table and understand why elements appear where they do, you can work out the likely valencies from the positions of the elements in the table - they are where they are for a reason!You must ask your chemistry teacher to explain this reasoning to you - it should form part of your lessons.This will helpGroup number 1 = Valency 1group number 2 = valency 2group number 3 = valency 3group number 4 = valency 4group number 5 = valency 3group number 6 = valency 2group number 7 = valency 1group number 8 = valency 0 (noble gases, nonreactive)
