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The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?
(b) Element with mass number 27 is Al. It has the atomic number equal to 13. Number of protons in Al atom = 13. Number of electrons in Al atom = 13. Number of electrons in Al³+ = 13 - 3 = 10. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
(b) Element with mass number 27 is Al. It has the atomic number equal to 13.
Number of protons in Al atom = 13.
Number of electrons in Al atom = 13.
Number of electrons in Al³+ = 13 – 3 = 10.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
See lessThe total number of terms in the expansion of (a² + 2ab + b²)¹⁰¹ is :
Choice (b) is correct. We have, (a² + 2ab + b²)¹⁰¹ = {(a + b)² }¹⁰¹ = (a + b) ²⁰² We know that the total number of terms in the expansion of (x + a)ⁿ is (n + 1). Total number of terms in the expansion of (a + b) ²⁰² is (202 + 1) = 203. Total number of terms in the expansion of (a² + 2ab + b²) ¹⁰¹ iRead more
Choice (b) is correct.
We have, (a² + 2ab + b²)¹⁰¹ = {(a + b)² }¹⁰¹ = (a + b) ²⁰²
We know that the total number of terms in the expansion of (x + a)ⁿ is (n + 1).
Total number of terms in the expansion of (a + b) ²⁰² is (202 + 1) = 203.
Total number of terms in the expansion of (a² + 2ab + b²) ¹⁰¹ is 203.
This question related to Chapter 7 maths Class 11th NCERT. From the Chapter 7: Binomial Theorem. Give answer according to your understanding.
For more please visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-11/maths/#chapter-7
Elements with valency 1 are
(c) Elements with valency 1 are either metals or non-metals. For example, sodium has a valency + 1 and chlorine has a valency - 1. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
(c) Elements with valency 1 are either metals or non-metals. For example, sodium has a valency + 1 and chlorine has a valency – 1.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-4/
See lessTonoplast is a differentially permeable membrane surrounding the
(b) Vacuole are bounded by a membrane called tonoplast. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
(b) Vacuole are bounded by a membrane called tonoplast.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
See lessCarbohydrates are present in the plasma membrane in the form of
(d) Plasma membrane is a bilayer made up of proteins and lipids. On the outer side of the membrane glucose units are attached to it. https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
(d) Plasma membrane is a bilayer made up of proteins and lipids. On the outer side of the membrane glucose units are attached to it.
https://www.tiwariacademy.com/ncert-solutions/class-9/science/chapter-5/
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