Answer:
I>Sn>Xe
Explanation:
Electron affinity refers to the ability of an atom to accept electron(s) and form a negative ion.
We know that electron affinity is a periodic trend that increases across the period but decreases down the group.
Hence the, electron affinity of iodine is far higher than that of tin. However, xenon is a noble gas and does not accept electrons. Hence, it has an electron affinity of 0 KJ/mol.
A physical change is something that could be reverted back to its original form, while a chemical change is something that could not be reverted back when changed.
ex of physical change: ice - can be melted and then freeze to solid again
ex of chemical change: change of color, like adding food coloring in something and you cannot take out the color again
2 atoms of hydrogen
2 atoms of oxygen
1 atom of nitrogen
3 atoms of hydrogen
3 atoms of carbon
8 atoms of hydrogen