Answers

2014-07-18T20:31:34+05:30
A line on map connecting points having the same atmospheric pressure.
Elements having same atomic mass but different atomic number.
3 3 3
isobars are same mass number but different atomic number
2014-07-18T20:32:02+05:30
Isobars-the atoms of different elements which have same mass number but differ in their atomic number
isotones- the atoms having different number of protons but same number of neutrons
4 3 4