The answer is c. number of protons and d. atomic number. The proton number can identify an element. And also the atomic number is equal to the number of protons.
Acids and bases ionoze the water. so it would have to be A
Answer:
107Ag has abundance of 51.7%
109Ag has abundance of 48.3%
Explanation: Please see attachment for explanation
Texture is physical
ability to react with other substances is chemical
hardness is physical
tarnish is chemical
temperatures chemical
electrical conductivity is physical
ferment is physical
mass is physical