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An element X has atomic number 19. What will be the formula of its oxide?
- a)X2O
- b)XO
- c)XO2
- d)X2O3
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
An element X has atomic number 19. What will be the formula of its oxi...
Element X has atomic number 19. Its valency will be one. Hence, the formula ofits oxide will be X2O.
Z = 19; 1s22s22p63s23p64s1
Z = 19; 1s22s22p63s23p64s1
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An element X has atomic number 19. What will be the formula of its oxi...
Atomic Number and Oxidation State
- The atomic number of an element is the number of protons in the nucleus of its atom.
- The atomic number determines the element's position in the periodic table and provides information about its properties.
- The oxidation state of an element refers to the charge it carries when it forms compounds. It is based on the gain or loss of electrons.
X's Atomic Number
- In this case, element X has an atomic number of 19.
- This means that it has 19 protons in its nucleus.
Determining the Formula of the Oxide
- To determine the formula of the oxide formed by element X, we need to find the oxidation state of X.
- In most cases, elements tend to gain or lose electrons to achieve a stable electron configuration.
- For elements in Group 1 of the periodic table, such as X, they tend to lose one electron to achieve a stable configuration similar to the nearest noble gas, in this case, argon (18 electrons).
- Losing one electron would result in a +1 charge.
Writing the Formula
- When X loses one electron, it forms a cation with a +1 charge.
- The oxide ion (O2-) has a -2 charge.
- To balance the charges, one X cation combines with two oxide ions.
- Therefore, the formula of the oxide will be X2O, where X represents the element with a +1 charge and O represents the oxide ion with a -2 charge.
Correct Answer
- The correct answer is option A, X2O.
- The atomic number of an element is the number of protons in the nucleus of its atom.
- The atomic number determines the element's position in the periodic table and provides information about its properties.
- The oxidation state of an element refers to the charge it carries when it forms compounds. It is based on the gain or loss of electrons.
X's Atomic Number
- In this case, element X has an atomic number of 19.
- This means that it has 19 protons in its nucleus.
Determining the Formula of the Oxide
- To determine the formula of the oxide formed by element X, we need to find the oxidation state of X.
- In most cases, elements tend to gain or lose electrons to achieve a stable electron configuration.
- For elements in Group 1 of the periodic table, such as X, they tend to lose one electron to achieve a stable configuration similar to the nearest noble gas, in this case, argon (18 electrons).
- Losing one electron would result in a +1 charge.
Writing the Formula
- When X loses one electron, it forms a cation with a +1 charge.
- The oxide ion (O2-) has a -2 charge.
- To balance the charges, one X cation combines with two oxide ions.
- Therefore, the formula of the oxide will be X2O, where X represents the element with a +1 charge and O represents the oxide ion with a -2 charge.
Correct Answer
- The correct answer is option A, X2O.
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An element X has atomic number 19. What will be the formula of its oxide?a)X2Ob)XOc)XO2d)X2O3Correct answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about An element X has atomic number 19. What will be the formula of its oxide?a)X2Ob)XOc)XO2d)X2O3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An element X has atomic number 19. What will be the formula of its oxide?a)X2Ob)XOc)XO2d)X2O3Correct answer is option 'A'. Can you explain this answer?.
An element X has atomic number 19. What will be the formula of its oxide?a)X2Ob)XOc)XO2d)X2O3Correct answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about An element X has atomic number 19. What will be the formula of its oxide?a)X2Ob)XOc)XO2d)X2O3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An element X has atomic number 19. What will be the formula of its oxide?a)X2Ob)XOc)XO2d)X2O3Correct answer is option 'A'. Can you explain this answer?.
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