The nucleus is made up of protons and neutrons. Therefore, the mass of the nucleus is called atomic mass. One is a positively charged particle proton and the other is a charge-neutral particle neutron.Īlmost all the mass of the atom is accumulated in the nucleus. There are two types of particles in the nucleus. We already know that the nucleus is at the center of the atom. Relationship between the atomic mass and sodium atomic number To know these properties of sodium one must know the atomic number of sodium. The electron in the last shell of sodium easily forms a bond by donating to another element. Therefore, sodium is the s-block element. The last electron of sodium enters the s-orbital. So, the valence electrons of sodium are one. And the last shell has a total of an electron. ![]() The last shell of sodium has an unpaired electron, so the valency of sodium is 1. The properties of an element can be determined by electron configuration. The atomic number can be used to determine the number of electrons in an element and the exact position of an element in a periodic table. Therefore, the number of negatively charged electrons orbiting in its orbit is equal to the number of positively charged protons in the nucleus.Ītomic number (Z) = Number of charges in the nucleus (p) Importance of the atomic number of sodiumĪn atomic number is a number that carries the properties of an element. That is the total number of protons in the atomic number. We know that protons are located in the nucleus of an atom as a positive charge. This number is equal to the serial number of the periodic table. The atomic number of the element is expressed by ‘Z’. Thus, the number of positive charges present in the nucleus of an element is called the atomic number of that element. He named that number the order of the atoms. The results of the experiment show that each element has a unique integer equal to the number of positive charges in the nucleus of that element. ![]() Scientist Henry Gwyn Jeffreys Moseley researched the X-ray spectrum of various elements in 1913-1914. This article discusses the properties of the sodium element and the importance of the sodium atomic number. Sodium is an alkali metal and its symbol is ‘Na’. Therefore, the atomic number of sodium(Na) is 11. The sodium atom contains a total of eleven electrons and protons. The eleventh element in the periodic table is sodium.
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