So, it loses 2 electrons. Barium 6. The electronic configuration of the element can be deduced as 1s² 2s² 2p⁶ 3s². For example: Electronic configuration of 12 Mg = 2, 8, 2 . Its electronic configuration is 2,8,5. Valency of non-metal chlorine = 8 – the number of valence electrons in its atom = 8 – 7 = 1 . iii) Valency of Calcium is 2. Magnesium (Atomic number = 12) has electronic configuration 2, 8, 2. Protons = 16 . (a) What is the group number of T? Click here to get an answer to your question ️ what is the valency of magnesium with atomic number 12 and chlorine with atomic number 17 ankitabareth200787 ankitabareth200787 13.03.2021 Science Primary School answered The valency of magnesium is 2. The electronic configuration of an element T is 2, 8, 8, 1. Recommended Videos It must be 2 because let valency of mg be x and valency of o is -2. Electronic configuration = 2, 8, 6 . Therefore, later on valency was defined as the number of chemical bonds formed by an atom in a molecule. So, Magnesium will complete its octet by donating or giving its 2 valence electrons to atoms of other elements. Answer and Explanation: The valency of magnesium is 2. 1 Answer +1 vote . Atomic Number of Magnesium is 12.. Chemical symbol for Magnesium is Mg. The valence shell has 2 electrons as the outermost shell is the Third shell. Electrons = 14 . It loses 2 electrons to complete octet configuration in its valence shell. The atomic number is 12. 8. ii) Calcium is more reactive than Magnesium. Thus, its valency is 3. Strontium 5. Calcium 4. Then its electron distribution is 2,8,2. Lead 9. K and L shells can accommodate a maximum of 2 and 8 electrons respectively. Magnesium, a chemical element with the symbol Mg and atomic number 12, is shiny grey white solid appearance element with the lowest melting and boiling points among all the alkaline earth metals.. Magnesium has a great biological role. Atomic number = 16 . The valence shell has 2 electrons. Valency is number of electrons gain or loss to achieve noble gas configuration I.e. Protons and Neutrons in Magnesium. You can use the Aufbau principle to help with the order. 13. Manganese 11. Now, the atomic number is 12, so the number of electrons in a neutral magnesium atom is 12. We need to refer to the periodic table to determine the electronic configuration of the chemical elements. Atomic number of magnesium is 12 and it's electronic configuration is 2,8,2. Now, the atomic number of this element is 12, so its electronic configuration will be Electrons = 16 . If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible. Magesium's average atomic mass is 24.305 atomic mass units, but no magnesium atom has exactly this mass. Iron (2 and 3) 12. What is the valency of magnesium with atomic number 12 and nitrogen with atomic number 7? It has 2 electrons in its valence shell. The neutrons are a different matter. Magnesium(Mg) Atomic Number: 12 Valency = 2 Aluminium(Al) Atomic Number: 13 Valency = 3 Silicon(Si) Atomic Number: 14 Valency = 4 Phosphorus(P) Atomic Number: 15 Valency = 3 Sulphur(S) Atomic Number: 16 Valency = 2 “A valence number is the number of electrons in the outer-most energy levels of an atom. The valency of magnesium is 2. Element with atomic number 12 is Magnesium and valency of Mg is + 2 Hope this information will clear your doubts about the topic. The magnesium atom can lose these two outermost electrons to form a magnesium ion, Mg 2+ having an inert gas electron configuration of 2, 8. So, it will need 6 electrons to complete the octet. Therefore, it tends to form the 2+ ion. Valency of Scandium – Atomic number of scandium is 21. 2 The valency of Sulphur is 8-6 = 2 because it is non-metal. Answer: Magnesium, atomic number =12 Electronic configuration = 2, 8, 2 ∴ Valency = 2 Nitrogen, atomic number = 7 Electronic configuration = 2, 5 ∴Valency = 3. Question 3. So the sum of valency of mg and o is equal to 0. Valency is the combining capacity of an element. The atomic number of magnesium is 12, and its electronic configuration is 2,8,2. For example, nitrogen forms a number of compounds with hydrogen such as NH3, N2H4, N3H in which nitrogen atoms have valencies of 3, 2 and 1/3 respectively. Atomic structure: (ii) Atomic number that can be determined from the atomic structure is 13 . Now, a magnesium atom has to lose 2 electrons in order to become Mg 2 +. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. As in case of alkali metals and alkaline earth metals reactivity increases with increase in atomic number. (d) What is the valency of T? Similarly, Magnesium with atomic number 12 will have electronic configuration 2, 8, 2. Atomic weight of Magnesium is 24.305 u or g/mol. The Atomic number of magnesium is 12. The magnesium atom (atomic number 12) is found in group 2 and has two valence electrons to lose. Question 2.What is the valency of magnesium with atomic number 12 and sulphur with atomic number 16? Cause the electrons present in the outer most shell is 2 and therefore it will lose the 2 electrons to become stable. Number of protons in Magnesium is 12. It has 12 electrons: 2 electrons in the 1st orbital in an s-shell 8 electrons in the 2nd orbital: 2 in an s-shell and 6 in the p-shell and 2 in the 3rd orbital, an s-shell. Regards, Valency of Mg is 2 . Mass number is 13 + 14 = 27 1 Answer +1 vote . (b) What is the period number of T? The atomic number of Magnesium is 12 so we expect the electrons also sum up to 12. Atomic number = 14 . Valency of magnesium = number of valence electrons in its atom = 2. On the other hand, if we consider the example of magnesium (atomic number = 12), the number of valence electrons is 2. Thus, this concept of valency as a mere number was not clear. Protons = 14 . The electrons present in the outermost shell are called valency of the atoms. Magnesium is a chemical element with atomic number 12 which means there are 12 protons in its nucleus. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure.The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Magnesium is a chemical element with atomic number 12 which means there are 12 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 … It gains 1 electron to complete octet configuration in its valence shell. Tin (2 and 4) 8. Valency of phosphorus – Atomic number of phosphorus is 15. For metals, it is equal to the number of electrons in the outermost shell of their atoms, and for nonmetals it is eight minus the number of electrons in the outermost shell. fully filled octet. Chromium (2 and 3) 10. Radium 7. The important interaction between phosphate and magnesium ions makes magnesium a very essential element to the nucleic acid of all cells. But, it is not easy for an atom to give 6 electrons to Mg. Magnesium 3. The atomic no. The electrons are counted from the s and p orbitals so the max number of valence electrons is 8. Valency is generally expressed in terms of the number of hydrogen atoms. Question 36. The element with atomic number 12 is Magnesium. The condensed electron configuration is Ne 3s2. 1.Beryllium 2. Solution : To find out the valency of the element, we will have to write down its electronic configuration. If number of electron is > 4 then (8-n) is applied where n is the number of electron present in outer most shell. 9. Atomic structure: Sulphur: Symbol = S . Atomic number of magnesium is 12 so its electronic configuration is 2, 8, 2. Why does the magnesium atom tend to form the 2+ ion? Electronic configuration = 2, 8, 4 . Transition metals like iron and copper show more than one valency in compound formation. Cobalt ( 2 and 3) 13. Magnesium has an atomic number of 12 and it belongs to the second group in the periodic table. For example, in chlorine (atomic number = 17), the number of valence electrons is 7, but here the atom will not lose these electrons. Keeping this in view, what is Valency number? Magnesium, in its elemental form, has 12 protons and 12 electrons. It is also a transition element but it doesn’t show variable valences. Atomic Number of Magnesium. Answer.Magnesium (12) --> 2, 8, 2 Sulphur (16) --> 2, 8, 6 The valency of Magnesium is same as valence electron, i.e. Melting point of Magnesium is 648,8 °C and its the boiling point is 1107 °C. What is the valency of magnesium with atomic number 12 and nitrogen with atomic number 7? Here, the atom will gain 1 electron to complete its octet. A list of familiar eIements having valency 2 are listed below. atomic theory; periodic classification; properties of elements; class-10; Share It On Facebook Twitter Email. Valency of Cl is (8-7) = 1 How many shells are present in all the elements that belong to period 3? K, L and M shells have 2, 8, 2 electrons respectively. So it can be stated that the element is Magnesium. (c) Since it has electronic configuration of 2, 8, 2, its atomic number is 12 and hence X is Magnesium (d) It is a metal. Hence, the number of electrons in mg2+ ion will be 10. So, it needs 3 electrons to fulfill its outermost shell and attain stability. Answer: Therefore, here the valency will be 1. of an element is 12 so the electronic configuration will be as follows :- 2,8,2 The valency of the element will be +2. You can determine an atom's valence number by looking at the periodic table of elements: Dynamic Periodic Table. periodic classification of elements; cbse; class-10; Share It On Facebook Twitter Email. Electronic configuration of 17 Cl= 2, 8, 7 . Magnesium has an atomic number of 12, and it belongs to the second group in the periodic table. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Chlorine (Atomic number = 17) has electronic configuration 2, 8, 7. Magnesium has an atomic number of 12 and it belongs to the second group in the periodic table. What is the valency of magnesium with atomic number 12 and nitrogen with atomic number 7? (c) How many valence electrons are there in an atom of T?
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