Cobalt-60 has an atomic weight of 60.00 g/mol and a half-life of 5.260 years. If you start with a 1.000 gram sample of the
isotope, how much time will pass before you have just 0.100
grams of the isotope left?
a 16.44 years
b 18.44 years
C 17.47 years
d 14.77 years

the correct name for the n3 ion is azide. azide is a polyatomic anion with a -1 charge and is written as n3 -1. it consists of three nitrogen atoms bonded together. hope i . let me know if you need anything else.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.