Which one of these elements was suggested as transition element by Mendeleev?
(a) N
(b)Ni
(c)Ne
(d)none

PLZ ANSWER SOOON
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How air particles exert a pressure on the inside of the balloon

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

Is 9 correct? and can someone me with 10? it’s due tomorrow, you