The Atomic Number Of Magnesium Is 12 How Many Protons Class 11 ...

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• The atomic number of magnesium...

AnswerQuestion Answers for Class 12Class 12 BiologyClass 12 ChemistryClass 12 EnglishClass 12 MathsClass 12 PhysicsClass 12 Social ScienceClass 12 Business StudiesClass 12 EconomicsQuestion Answers for Class 11Class 11 EconomicsClass 11 Computer ScienceClass 11 BiologyClass 11 ChemistryClass 11 EnglishClass 11 MathsClass 11 PhysicsClass 11 Social ScienceClass 11 AccountancyClass 11 Business StudiesQuestion Answers for Class 10Class 10 ScienceClass 10 EnglishClass 10 MathsClass 10 Social ScienceClass 10 General KnowledgeQuestion Answers for Class 9Class 9 General KnowledgeClass 9 ScienceClass 9 EnglishClass 9 MathsClass 9 Social ScienceQuestion Answers for Class 8Class 8 ScienceClass 8 EnglishClass 8 MathsClass 8 Social ScienceQuestion Answers for Class 7Class 7 ScienceClass 7 EnglishClass 7 MathsClass 7 Social ScienceQuestion Answers for Class 6Class 6 ScienceClass 6 EnglishClass 6 MathsClass 6 Social ScienceQuestion Answers for Class 5Class 5 ScienceClass 5 EnglishClass 5 MathsClass 5 Social ScienceQuestion Answers for Class 4Class 4 ScienceClass 4 EnglishClass 4 MathsThe atomic number of magnesium is 12. How many protons are there in the nucleus of the magnesium atom? How many electrons and protons does an ion of magnesium which has a charge of +2 contain?(A) 10, 10(B) 10, 13(C) 11, 12 (D) 10, 12AnswerVerified599.7k+ viewsHint: Atomic number gives the number of protons in the nucleus of an atom. To maintain the electrical neutrality of an atom, the number of protons is equal to the number of electrons in an atom. Complete step by step solution:The atomic number is usually represented by Z. The given atomic number of magnesium, Z = 12.As we know that atomic number is equal to the number of protons in the nucleus of an atom. Therefore, we can write the number of protons in the nucleus of the Mg atom is equal toThe number of protons in Mg = atomic number (Z) of Mg = 12.We further know that an atom is electrically neutral and thus contains an equal number of protons and electrons. Mg atom has 12 protons then the number of electrons in the Mg atom will be:Number of protons in Mg atom = number of electrons in Mg atom = 12 Now, when the Mg atom loses two electrons, the number of electrons will decrease by 2. Since the number of protons remains unchanged, there will be 2 extra protons in the nucleus. Thus, Mg atom converts to ion having 2 units of positive charge, i.e. $M{{g}^{2+}}$. Therefore, in Mg ion having +2 charge, Number of electrons = 12– 2 = 10. The number of protons = 12.Hence, the correct option is (D).Note: Note that decrease in the number of electrons from a neutral atom leads to an exact increase in the number of protons (and hence, the positive charge) in the nucleus. Loss of electrons by an element leads to an increase in its oxidation number. Magnesium loses two electrons and its oxidation number increases from 0 to +2.Recently Updated PagesBasicity of sulphurous acid and sulphuric acid areMaster Class 11 Business Studies: Engaging Questions & Answers for SuccessMaster Class 11 Computer Science: Engaging Questions & Answers for SuccessMaster Class 11 Economics: Engaging Questions & Answers for SuccessMaster Class 11 Social Science: Engaging Questions & Answers for SuccessMaster Class 11 English: Engaging Questions & Answers for SuccessBasicity of sulphurous acid and sulphuric acid areMaster Class 11 Business Studies: Engaging Questions & Answers for SuccessMaster Class 11 Computer Science: Engaging Questions & Answers for SuccessMaster Class 11 Economics: Engaging Questions & Answers for SuccessMaster Class 11 Social Science: Engaging Questions & Answers for SuccessMaster Class 11 English: Engaging Questions & Answers for Success

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