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An electron has kinetic energy 2.8 x 10 -23J . de-Broglie wavelength will be nearly:
(me: 9.1 x 10 -31 kg)
(1) 9.28x 10-4m
(2) 9.28 x10-7 m
(3) 9.28 x 10 -8m
(4) 9.28x 10 -10 m
Ans:(c) 9.28 x 10 -8m
enthalpy of formation of acetic acid
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The maximum energy is present in any electron at: (1) Nucleus (2) Ground state (3) First excited state (4) Infinite distance from the nucleus Ans: Infinite dis
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The hydride ions H- are isoelectronic with: (1) Li (2) He + (3) He (4) Be Ans: He
define s-block properties?
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