Valence Electrons Questions and Answers

The Valence Electrons are a type of outer shell electron. Which can participate in the formation of a chemical bond and attach to an atom even if the outer shell is not closed. It also contributes to the formation of a shared electron in both atoms, in a single covalent bond.

The valence electron of an element can be determined as the no. of electrons present in its outermost shell. It can be easily counted by knowing the group that an element belongs to.

There are only 6 electrons available in Oxygen. So, the oxygen has 6 valence electrons.

The valence electron of any transition metals can be determined as the total no. of electrons that are in higher energy levels.

The number of valence electrons for a compound can be calculated by adding the valence electrons of all the atoms that form that respective compound. For example, in CO2 there is one Carbon atom and two oxygen atoms, and the no. of valence electron in O is 6 and in C is 4. Therefore, the total no of the valence electron in CO2 is = 1*4 + 2*6 => 4 + 12 => 16 electrons

Carbon contains 4 electrons in its outer shell out of total 6 electrons, thus it has 4 valence electrons. The electronic configuration of Carbon is 2, 4.

Nitrogen contains 3 electrons in its outer shell out of total of 7 electrons, thus it has 3 valence electrons. The electronic configuration of Nitrogen is 2, 3.

Chlorine contains 7 electrons in its outer shell out of total of 17 electrons, thus it has 7 valence electrons. The electronic configuration of Chlorine is 2, 8, 7.

Fluorine contains 7 electrons in its outer shell out of total of 9 electrons, thus it has 7 valence electrons. The electronic configuration of Fluorine is 2, 7.

Antimony contains 5 electrons in its outer shell, thus it has 5 valence electrons. The electronic configuration of Antimony is 2, 8, 18, 18, 5.

Argon contains 8 electrons in its outer shell, thus it has 8 valence electrons. The electronic configuration of Argon is 2, 8, 8.

Helium contains only 2 electrons and both are present in the k shell, thus it has 2 valence electrons.

The atomic number of Helium is 2. Helium is one of the most significant member of the noble gas family that can be found on the upper right side of the periodic table.

The electronic configuration of helium is He(Z=2) = 1s2.

Rhenium contains 2 electrons in its outer shell, thus it has 2 valence electrons. The electronic configuration of Rhenium is 2, 8, 18, 32, 13, 2.

Boron contains 3 electrons in its outer shell, thus it has 3 valence electrons. The electronic configuration of Boron is 2, 5.

Sulfur contains 6 electrons in its outer shell, thus it has 6 valence electrons. The electronic configuration of the Sulfur is 2, 8, 6.

Magnesium contains 2 electrons in its outer shell, thus it has 2 valence electrons. The electronic configuration of Magnesium is 2, 8, 2.

Aluminum contains 3 electrons in its outer shell, thus it has 3 valence electrons. The electronic configuration of Antimony is 2, 8, 3.

Pentavalent impurities contain 5 electrons in their outer shell or valence shell, thus it has 5 valence electrons.

Arsenic contains 5 electrons in its outer shell, thus it has 5 valence electrons. The electronic configuration of Arsenic is 2, 8, 18, 5.

Silicon contains 4 electrons in its outer shell, thus it has 4 valence electrons. The electronic configuration of Silicon is 2, 8, 4.

Typically Noble Gases have 8 valence electrons. The only exception is Helium that has 3 valence electrons.

In AlCl3 Al have 3 valence electron and Cl have 7 valence electron, total electrons => 3 + 7*3 => 3 + 21 => 22. Thus total no. of valence electron is 22.

Lithium contains 1 electron in its outer shell, thus it has 1 valence electron. The electronic configuration of Lithium is 2, 1.

As Neon is a noble gas thus it has 8 valence electrons. As it contains 8 electrons in its outer shell or valence shell.

Gold contains 1 electron in its outer shell, thus it has 1 valence electron only.

Carbon contains 4 electrons in its outer shell out of total of 6 electrons, thus it has 4 valence electrons.The electronic configuration of Carbon is 2, 4.

Bromine contains 7 electrons in its outer shell, thus it has 7 valence electrons. Bromine belongs to the halogen family and the electronic configuration of Bromine is 2, 8, 18, 7.

Beryllium contains 2 electrons in its outer shell out of total of 4 electrons, thus it has 2 valence electrons. The electronic configuration of Beryllium is 2, 2.

Bismuth contains 5 electrons in its valence shell or its outer shell, thus it contains 5 valence electrons. As Bismuth is a Pentavalent post-transition metal thus it can be noted that it contains 5 valence electrons.

Calcium contains 2 electrons in its outer shell, thus it has 2 valence electrons. The electronic configuration of Calcium is 2, 8, 8, 2.

The electronic configuration of Chromium is 3d5 4s1 i.e. 5 electrons in 3d shell and 1 electron in 4s shell, thus Chromium has 6 valence electrons.

The electronic configuration of Cobalt is 3d7 4s2 i.e. 7 electrons in 3d shell and 2 electrons in 4s shell, thus Chromium has 9 valence electron.

The electronic configuration of Dysprosium is 4f10 6s2 i.e. 10 electrons in 4f shell and 2 electrons in 6s shell, it is a rare earth metal or lanthanide metal. Chromium has 3 valence electrons.

The electronic configuration of Dubnium is 5f14 6d3 7s2 i.e. 3 electrons in 6d shell and 2 electrons in 7s shell, thus Dubnium has 5 valence electron.

Darmstadtium (Ds) belongs to Group 10 and its Atomic Number is 110. The electronic configuration of Darmsdatium is 5f14 6d8 7s2 i.e. 8 electrons in 6d shell and 2 electrons in 7s shell.

Dihydrogen Monoxide means H2O. As Hydrogen contains 1 valence electron and Oxygen contains 6 valence electrons, therefore in Dihydrogen Monoxide (H2O) the no. of valence electrons => 2*1 + 6 => 2 + 6 => 8 electrons.

A Dichromate have 56 valence electrons. A valence electron is a type of outer shell electron. Which can participate in the formation of a chemical bond and attach to an atom even if the outer shell is not closed.

The Germanium has 4 Valence Electrons. It is a bright, hard, brittle, and white metallic colored chemical element in the carbon group. Its atomic number is 32 and the chemical symbol is Ge.