Q&A for How to Find Valence Electrons

Valence electrons can be found by determining the electronic configurations of elements. Thereafter the number of electrons in the outermost shell gives the total number of valence electrons in that element.

If the atom is not an ion, then we can say that the atom has 33 protons. This means it is element 33, which is arsenic. Then we know that it is not a transition metal, so we look and find the unit digit of its group number is 5, which means it has 5 valence electrons.

The number of protons equals the atomic number.

Atoms gain or lose electrons, negative charges, because the protons have the positive charge and they are held in the nucleus by the strong nuclear force. This is one of four distinct forces in the Universe: gravity, electromagnetism, the weak force and the strong nuclear force. It's got to be strong because protons repel each other yet they are really close together in the nucleus (along with the neutrons, also held by the strong force.) The idea is that the strong force is extremely strong but only over very tiny distances. Think tiny super strong hooks. To get protons and neutrons to hook up, you need forces like the immense gravity of a star, a supernova, or nuclear explosion.

Noble gases have eight valence electrons - the most stable state for an element.

Nitrogen [N] has only five valance electrons because it is in group 5, though it is actually in group 15 you are going to ignore the transitional metals [group 3-12] because these groups have different way of determining their valence electrons. Therefore: group 13 means group 3 so on and so forth.

The element that contains 7 protons is Nitrogen. Nitrogen is in the column of elements that has 5 electrons in the valence shell. The number of neutrons is irrelevant to finding the number of valence electrons in a specific element.

Look in the second to last column on the right hand side, next to the inert gases.

A valence electron is an electron that is found on the outermost part of an atom and can be shared or taken in a reaction.

They have different chemical structures. Valence electrons are what create chemical reactions.

First write the given formula, interchange the subscript and write it as superscript. Then both with 2. The result gives the valency of the element.

No, a hydrogen isotope will only have 1 valence electron. Since hydrogen is in group 1, it will have 1 valence electron (it only electron). In my experience, there are no actions that can hold such a charge (7- chrage). It would probably fuse into something else through a nuclear reaction if it does hold 8 valence electrons for fractional amount of time. Helium will have 2 valence electrons most of the time -- it is a noble gas, the actual definition of which is to have the outermost layer filled. Helium is the only noble gas with 2 electrons possible in the outermost layer because of its period.

First do electronic configuration if Mn =2,8,8,7. Therefore in the outermost shell (valence shell) there are 7 VALENCE e- .

Look at the atomic mass of the element, it's the number at the bottom of the box. The atomic number, at the top of the box, is the number of protons and neutrons together. Subtract the atomic number from the atomic mass. The difference is the number of neutrons, while the atomic number is the number of electrons and protons (they have the same number).

It is quite easy to calculate the number of valence electrons once you know the number of valence electrons. If an element has 1,2,3 or 4 valence electrons, its valency is the same. For example, lithium has an atomic number of 3 with 1 electron in its outermost shell. Hence, its valency is 1. If an atom has 5, 6, 7 or 8 valence electrons, then the valency of that element can be obtained by subtracting the number of its valence electrons from 8. For example, (i) Nitrogen has 5 electrons in its outermost shell. Therefore, its valency is 8 - 5 = 3. (ii) Argon has 8 electrons in its outermost shell. Therefore, its valency is 8 - 8 = 0.

Carbon atoms have 4 valence electrons out of 6 electrons in total, assuming that it's a neutral atom.

By looking at the group of the element. The group number corresponds to the number of valence electrons.

A Lewis Structure ( also known as a Lewis Dot Structure) is a model to demonstrate the bonding of valence electrons from 1 atom or element into a compound.

Actually, there is no valency of compounds. Compounds are formed by giving or donating valence electrons of atoms.

Valence electrons are the electrons at the furthermost shell, which determines what kind of bonds it can make.

Just add together the amount of protons (or more simply, the atomic numbers) of each component atom. N is #7 on the periodic table (seventh element if you count to it), while H is 1. Because atomic number means the amount of protons it has, just add the numbers together, 7+1+1+1 (there are three 1's because H_3 means that there are three hydrogen atoms in the bond), which gives you 10 electrons in total for this compound.

Just like you find the remaining ones. Starting from 31st till the very end. The process is the same.

Because there are only 2 electrons in Helium and these 2 electrons are in the 1st orbital and would share their electrons rather comfortably.

Since the 19th element, K (Potassium) is in Group 1, it has 1 valence electron. See Part 1, Step 4.

The valency of an atom is equal to the number of electrons in the outer shell if that number is four or less.

An atom may tend to accept or lose electrons from an incomplete sub-shell if doing so will result in a full sub-shell, so sub-shell electrons may behave like valence electrons.

Valence electrons can be found by determining the electronic configurations of elements.

Look in the second to last column on the right hand side, next to the inert gases.