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How does the periodic table indicate the number of valence electrons an element have?
Wiki User
∙ 9y ago
By the group number of the A columns.....go apex :D
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoBy looking at the column numbers
example:
Hydrogen
has 1 valence electron
Valency number is the same as the number "X" A on top of the group e.g Group1 1A has a valency of 1 group 2 2 A valency of 2 ........group5A valence of 5 in the Periodic Table there are metals nonmetals and metalloids
Wiki User
∙ 13y agoWell, the column containing hydrogen and lithium down has 1, the column with beryllium has 2, the column with boron has 3, the column with carbon has 4 , the column with nitrogen has 5, the column with oxygen has 6, the column with fluorine has 7 and the column with helium has 8. Transition metals generally have 2 with some exceptions.
Wiki User
∙ 12y agoValence electrons are the electrons in the outermost energy level for any atom. For groups (Columns) 1 (Hydrogen's family), through 8 (Helium's family)it is fairly easy. In these the group number is the number of valence electrons. So if you were to look at Boron (element number 5) it is in group three so it has three valence electrons. If you looked at Silicon in group 4 it has 4 valence electrons. Once you get into what are called the transition metals (the columns with Sc through Zn at the top) it get's trickier. These metals can have unusual electron configurations which means their valence electrons can vary. As a general rule these will have 2 valence electrons (both in what is called the s sub-level) but again this can vary.
Wiki User
∙ 11y agoYou can tell the amount of valence electrons by looking at the periodic table by looking at what group it is in. This is found out by looking at the box of the element and going straight up until you hit a number. This is the group number and also the number of valence electrons. The exception is for numbers 13, 14, 15, and so on. For these, just take the one off the number and that is the number of valence electrons. So, an element in group 15 would have 5 valence electrons. Another exception is He and H; they are different because each only have one shell and are full with two valence electrons. So an example of an element is Calcium - it is in group 2 and has 2 valence electrons.
Wiki User
∙ 11y agoThe group number of an element indicates number of valence electrons.
Wiki User
∙ 7y agoPeriodic table indicates the number of valence electrons.It show electron configuration of electrons.The last number of electron configuration represent number of valence electron.
Becca Boe
by the group number of the A columns
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The number of electrons in atoms determine in element's propertices?
the valence electrons cause the chemical reations. the valence electrons decide that element attract to which element.
Does the valence electrons equal the number of protons?
Rarely. The number of valence electrons of an element depends on it's position on the periodic table. Any given element can have between 1-8 valence electrons. The number of valence electrons increases left to right on the periodic table, while the number of protons, which determine the atomic mass and identity of an element, increase in general. Therefore the number of valence electrons can only equal the number of protons at the 8th element and below (neon).
What does a group indicate?
The columns of the periodic table are called groups.
Where are element with few valence electrons found on the periodic table?
toward the left- apex
What major change occurs as you move left to right on the periodic table?
As you move left to right on the periodic table, the number of valence electrons an element has increases. The number of valence electrons an element has corresponds to which group (column) an element is. (This rule does not apply to transition metals...)
How does the periodic table indicate the numbers of valence electrons an element has?
By the group number of the A columns
How does the periodic table indicate the number of the valence electrons an element has?
By the group number of the A columns.....go apex :D
How does the periodic table indicate the number valence electrons an element has?
By the group number of the A columns.....go apex :D
What element whose valence electrons is full with two electrons on the periodic table?
Helium
In an periodic table dots around an elements symbol indicate the number of valence electrons in an atom?
yes, the number of dots represent the number of valence electrons in the periodic table.
The number of electrons in atoms determine in element's propertices?
the valence electrons cause the chemical reations. the valence electrons decide that element attract to which element.
How many valence electrons are there in phosphuros?
The number of valence electrons in any element can be found from the element's group number on the periodic table. Phosphorus has a group number of 5 (15 in some periodic tables, in which case the valence is the group number minus ten). Thus, phosphorus has 5 valence electrons.
Does the valence electrons equal the number of protons?
Rarely. The number of valence electrons of an element depends on it's position on the periodic table. Any given element can have between 1-8 valence electrons. The number of valence electrons increases left to right on the periodic table, while the number of protons, which determine the atomic mass and identity of an element, increase in general. Therefore the number of valence electrons can only equal the number of protons at the 8th element and below (neon).
How many electrons are in group16 of the periodic table?
there are 6 valence electrons in each element in group 16
How many valence electrons does chlorine have?
The element chlorine has seven electrons in its valence shell.
How can i look at the periodic table and tell how many valence electrons an element has?
The group of the element indicates the amount of valence electrons. For example, the alkali metals have one valence electron and is in group one whilst the halogens have seven valence electrons and are in group seven.
What does a group indicate?
The columns of the periodic table are called groups.
