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Simun Mishra posted an Question

August 31, 2020 • 04:05 am

30 points

IIT JAM
Chemistry (CY)

Lanthanum and actinum belongs to d block or f block can u pls explain it ?

2 Answer(s)

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Priyanshu kumar

Both belongs to d block
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After lanthanum 14 elements is f block elements
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and after actinium 14 elements is f block elements
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ok sir tq
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you're welcome simun😊
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Dinesh khalmaniya 1

hope this will help you 🙏🙏🙏🙏
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Dinesh khalmaniya 1 Best Answer

d block Lanthanum and actinium are usually regarded as d-block elements (Myers, Oldham & Tocci 2004, p. 130) and generally counted as lanthanides and actinides (the rest of which occupy the f-block). Some periodic tables, like the one from LANL emphasise chemical similarities, so lanthanum and actinium are shown at the foot of the table, along with the f-block elements. That's fine, but leaves a hole under yttrium so it isn't clear which two elements go there. Other tables, like the one from the Royal Society of Chemistry, presumably rely on electron configurations to work our which elements fit under yttrium, and use colour shading to emphasise similarities in chemical behaviour. Myers RT, Oldham KB & Tocci S 2004, Holt Chemistry, Holt, Rinehart and Winston, Orlando
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so sir after la and ac all belongs to f na
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but not this 2
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yes
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??
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yes sir I got it 😊
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😁👍👍
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tq sir good night sir 🙏🙏
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gn
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sir nobel gases are discovered by ?
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Sir William Ramsay
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ok sir sorry sir their was some network issues
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