Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.
Explanation:
Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
True is does make up 90 percent
Solution. because the substances can't go back to their original form. like kool aid, when its mixed you cant separate the powder and the water again.
- No of protons=No of electrons=15
<h3>Mass no:-No of neutrons+No of protons </h3>
Now
- It has atomic no 15 hence its Phosphorus(P)
Electronic configuration:-
.
Chloride formula:-
or.
By what I have learned I don't think that is chemical but if I had to guess I would say the chemical treatment is they are exposed to air
