Answer:
Option (A) Each Zn atom loses 2 electrons, and each Co2+ ion gains 2
Explanation:
To know the right answer to the question, let us observe the changes in the oxidation number of Zn and Co. This is illustrated below:
Zn(s) + Co2+(aq) → Zn2+(aq) + Co(s)
The oxidation number of Zn changes from 0 to +2 indicating that Zn has lose 2 electrons.
The oxidation number of Co changes from +2 to 0 indicating that Co has gain 2 electrons.
Therefore, option A is the correct answer.
The answer is B) dry and irregular
Physical Change because a new substance was not created and if it was a chemical change, a new substance would have to be created.
It’s Ca3N2 I hope this is helpful
Answer:
The atomic number is the number of protons in the nucleus and also the number of orbiting electrons. The mass number is the number of protons and neutrons in the nucleus.
The mass number minus the atomic number is the number of neutrons in the nucleus.
An isotope will have a different atomic mass.
