Number of electrons in `-CONH_2` is

Number of electron is CO_(2) is

The number of electrons in Ca2+ is ...................

Find the number of electron - donating groups in resonance among the following : {:("a) "-CONH_(2), "b) "-NO_(2), "c) "-OCOCH_(3), "d) "-COOCH_(3)), ("e) "-CHO, "f) "-NHCOCH_(3),"",""):}

A neutral atom has 2k-electrons, 8l-electrons and 3m-electrons. Predict from this: Its atomic number Total number of s-electrons, total number of p-electrons and d-electrons.

The intermediate formed during the reaction of R-CONH_2 with Br_2 and KOH are

The major product in the reaction, CH_3-CONH_2+HNO_2to is -