The valence electrons are the total number of electrons in the last orbit. The total number of electrons in the last shell after the electron what is the proton’s speed as it passes through point p? configuration of gallium is called the valence electrons of gallium. The elements in Group 2 are called the alkaline earth metals .

To know the number of electrons, you need to know the number of protons in carbon. And to know the number of protons, you need to know the atomic number of the carbon element. It is necessary to know the atomic number of carbon elements from the periodic table. The electron configuration of carbon shows that the last shell of carbon has a total of four electrons.

Each hydrogen atom has one valence electron and is univalent. Electrons are distributed in different energy shells denoted by \(\,\,\,…\) known as the electronic configuration of the element. By knowing the electronic configuration of an element, we can determine the number of valence electrons present in the atom’s valence shell. That is, we can finally say that there are electrons equal to the atomic number in the beryllium atom. From the periodic table, we see that the atomic number of beryllium is 4.

The last electron configuration of carbon implies that the maximum unpaired number of electrons in a carbon atom is 4. Therefore, the valence of a carbon atom is 4. Therefore, the valency of carbon atoms is 2, 4. In this step, the electrons of carbon have to be arranged. We know that carbon atoms have a total of six electrons. The electron configuration of carbon shows that there are two electrons in the K shell and four in the L shell.

Once you know the number of electrons, you can easily calculate the valency. The charge on the barium ion is 2+, meaning it has a positive charge of two. Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. It would tend to lose three electrons and form a +3 ion. Barium has 2 e-s in its outer shell., with atomic no. of 56. So the outer most shell contains 2 e-s and these e-s are ready to be lost.