Answer:
Is about 0.53 angstroms
Explanation:
The "size" of an atom in this definition is related with the nucleus size plus the cloud of electrons that surround the nucleus, in this case, since the Hydrogen in its basic state has only one electron, practically the size of the nucleus is the size of the atom, that is 0.53 angstroms or 5.3 x 10 -11 meters.
Hope this info is useful.
N2+3H2-->2NH3
is the answer
The best answer is B.....
In my words though, the oxidation state helps with you knowing how many electrons are lost or gain by the reactant to produce its product and by knowing this you can then balance the electron transfer and ultimately the equations.
1) Left up: a chemical change. We can see new substance (red-blue) is formed from one blue and one red atom.
In chemical change new substances are formed, the atoms are rearranged and the reaction is followed by an energy change.
2) Left down: a chemical change. We can see new substance (red-blue) is formed from two blue and one red atoms.
3) MIddle: a physical change. There is no new substance. Bonds are not broken.
4) Right up: a chemical change. Bonds are broken.
5) Right down: a physical change. Change of state of matter.
B. is the right option. hope it will help you!