Draw a Bohr model showing the number of
protons and neutrons and the electron
arrangement (including pairs and single
electrons) for these atoms.
(a) hydrogen-1
(b) hydrogen-2
(c) beryllium-9
(d) magnesium-26
(e) sulfur-36

How many neutrons does a atom of cobalt have?

Answer from each drop-down menu. e characteristics of a borane molecule (bh). the lewis structure and table of electronegativities are given olecular shape is and the molecule is reset next erved. search e a

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.