Atomic structure

In this article we are going to focus on the atom it's structure what it's made up and things like that so lets begin let's focous on corbon. If you look at the periodic table. Corbon has an atomic number of six. It has six protons and the neutrons are found at the center or the nucleus of the atom surrounded a nucleus. You have different energy levels in the frist energy level. Carbons gas two electrons that's the greatest number of electrons. You can have in the frist show in a second shell or second energy level 

valence electrons

Carbon has four electrons. So as you can see the elections are out side of the nucleus. they are orbiting a nucleus electrons carrying negative charges. Protons they have positive charges. Neutrons are neutral so corban has a total of six electrons the two electrons on the inside are known as core electrons and the electrons in the lost or the outermost energy level are known as the valence electrons. So carbon has four valence electrons. If you look where corbon is located on a periodic table. It is found in group 4a which is the some as group 14 electrons in group 4a . Typically have four valence electrons alkali metals which are found in group 1a contain one valence electron. 

Alkali earth metal

Alkali earth metal group 2a contains two valence electrons . The halogen will join group 7a contains seven valence electrons so you can find a number of valence based on which group. The element isolated in consider this symbol. He stond for helium in the periodic table you are going to see something that looks like this. There is a number on tap and there's a number on the bottom the smaller of there number represents the atomic number two. It has two protons the number of neutrons is equal to the mass number minus the atomic number and the number of electrons is equal to the atomic number.