An element 'X' has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of 'X'. Also write group number, period number and valency of 'X'.
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An element with mass number 81 contains 31.7% more neutrons as compare to protons find out atomic symbol of element.
Let protons = x Mass number = P+n Then neutrons= x + 31.7% of x 81= x + 1.317x X=35 Symbol= Br
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Calculate the atomic number of an element whose mass number is 31 and number of neutrons is 13. What is the symbol of the element?
We know that, mass number = Number of protons + Number of neutrons But number of protons is equal to the atomic number. ∴ Mass number = Atomic number + number of...
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An element 'M' has atomic number 11. (i) Write its electronic configuration. (ii) State the group to which'M'belongs.
(i) 2,8, 1 (ii) Group 1 (iii) Metal (iv) MCl
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An element 'M' has atomic number 12. (i) Write its electronic configuration and valency.
(i) Electronic Configuration -2,8,2 Valency - 2. (ii) Metal There are two electrons in its outermost shell and it easily loses them to form a positive ion. (iii) M -2 O-2 M2O2 = MO It is a...
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Write the electronic configuration of two elements P (atomic number 17) and Q (atomic number 19)
EGckonic Configuration of 'P'-2,8,7 Group number - 17 Period number 3rd Period Electronic Configuration of 'Q' - 2,8,8,1 Group number - 1 Period number - 4th Period
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The atomic number of an element is 20. (a) Write its electronic configuration and determine its valency.
(a) X(20)-2,8,8,2 Valence electrons- 2 Hence valency is 2 (b) It is a metal (c) XCl2 (d) It is more reactive than Mg as reactivity increases down the group Mg- III Period And X20 (Ca)- IV Period
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The atomic number of an element 'X' is 19. (i) Write its electronic configuration.
(i) Electronic Configuration of X(19) - 2,8,8, 1. (ii) Fourth Period Valency 1. (iii) Basic oxide (X2O). (iv) X2O+H2O → 2XOH.
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An atom has electronic configuration 2,8,2. (i) What is the atomic number of this element ?
(i) 12. (ii) 2. (iii) Be. Because Be has two electrons in its valence shell. Given element also has two electrons in its valence shell. Since valence electrons determine the chemical property, hence the...
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The electronic configuration of an element is 1s^2, 2s^22p^6,3s^23p^4. The atomic number of the element
Explanation (B) 34 At. No. = 16(S) Next element below this element has atomic number = 16 + 18 = 34
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The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ________
(i) 1s2 2s2 2p6 3s2 3p6 3d5 4s2
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