Question

Fill in the blanks.

a) Hydrogen burns with ________ flame.


b) Hydrogen is ___________ gas but not a supporter of _________.


c) The modern long form of Periodic Table has ______ periods and _______ groups.


d) Shortest and longest periods of modern Periodic Table are _______ and _______ respectively.​

Answer 1

Answer:

a) Pale blue flame

b) combustible, combustion

c) seven period, eighteen groups

d) 1st period, transition period

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Answer 2

Answer:

a) Hydrogen burns with ______ flame :

pale blue flame