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The position of which of the elements in Mendeleev`s periodic table is controversial?
Aluminium is placed prior to silicon, but this defies the law. As aluminium's weight is 29.98 where-areas silicon's weight is 28.09. Aluminium has more weight, but it is placed in the wrong place. Hydrogen's place is still a controversy as its similar to halogens and alkaline metals. So the answer is aluminium not hydrogen. Please change your answer.
How can we write 7
in decimal form?
first we write this mixed fraction in improper fraction format = 71/10 = 7.1
"have to" should be changed to "Had to" according to rules
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Its 8 because it should follow the magic number rule 2,8,8,18,18,32,32....... so pls change your ans