I do not see any mistakes so I think you’re good!
1 ) J.J. Thompson discovered the electron and put forward the 'plum pudding model' with charges spread evenly throughout the atom, in 1897
so the correct answer would be a positive solid sphere with electrons dispersed throughtout
If you mean a mineral, then the correct answer would be c. non-living
Answer:-
190.23 gram mol-1
Explanation:-
Molar mass is the mass of 1 mole of that substance. It's unit is gram / mol or gram mol-1.
For an element it is equal to it's atomic weight.
The atomic weight of Osmium is 190.23
Hence the molar mass of Osmium is 190.23 gram / mol
