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For groups 1-2 the number of valence electrons is equal to the number of the group.
For groups 13-18 the number of valence electrons is equal to the number of the group, but with numbering starting up from 3 (13), 4 (14) , etc. (transition metals excluded).

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Q: How do you figure out how many valence electrons an atom has based on its location on the periodic table?
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Related questions

How do you figure out valence shell and valence electrons?

Valence sheels must be on the outer side


How many core electrons in nitrogen?

Nitrogen has 2 core electrons and 5 valence electrons. If you remember, nitrogen has an atomic number of 7. When an atom is neutral it has an equal number of protons and electrons. Therfore, the overal number of electrons is 7. The definition of core electrons is, electrons in their most inner shell, On the other hand valence electrons are electrons in the outermostshell. When looking at a periodic table you see that there is a total# of 5 valence electrons. In order to figure out the core number you subtract the total number of electrons(atomic #) - Valence # of electrons. I hope this helped :)


How many valence electrons are in TiO2?

The electronic configuration of Tin is [Kr]4d10 5s2p2. Valence electrons are the electrons on the outermost shell of the neutral atom. Since the outermost shell is the 5th one, we have 4 valence electrons (2 of s and 2 of p)


What member of the nitrogen family has five valence electrons and can be found in the third electron orbital shell?

All elements in the group of Nitrogen, such as Phosphorus and Arsenic, have five valence electron when in their natural state (that is, they have not have not gained or lost valence electrons). But as to the element in that group that has valence electrons in the third electron orbital, Phosphorus is the one you are looking for. To figure this out, just look at the Periodic Table of Elements, and you will see that Phosphorus is in the third row. Hope this helps!


What do yo notice about the location of the elements in each family?

well its takes for ever to figure out


What is valance electron and free electrol describe with figure?

valence electrons are the remaining electrons after which an atom has attains its octate level


How do you figure out the core charge of an atom?

the atomic core charge of an atom is the same as the number of valence electrons in the atom


What indicates the valence electrons on the periodic table?

Valence numbers, in relation to the periodic table, mean electrons. If you know the basics of chemistry, you know that electrons form pairs in the "shells" of an atom. The valence number refers to the number of electrons in the outermost "shell".


How do you count the valence electrons of an atom?

Take the atomic number then subtract the amount of valence electrons. Example: Number of non valence (inner) electrons in Sulfur: 16 (atomic number) - 6 (valence electrons) = 10 (valence or inner electrons)


What is the prediction of valence electrons for lead?

Lead has 4 valence electrons. You figure this out by first creating an Electron Configuration chart, and then adding up the last two S and P values (the ones furthest form the nucleus). There are 2 Ss and 2 Ps. 2+2=4!


Outside the nucleus are electrons that are involved in what?

Outside the nucleus, electrons are present in their orbits. The valence electrons present outside is involved in forming bonds with other atoms. (figure it out yourself scrub)


How do you figure out how many protons and electrons and atom has. You must look at what?

Look at its atomic number in a periodic table.