I had to identify 3 elements. For those element which are isoptopes, I had to wr

Question

I had to identify 3 elements. For those element which are isoptopes, I had to write the molecular symbol using the following form, it state don't forget the charge for ions. In identifying an element with 18 electron, 20 protons and 35 neutrons. I had Ca with 55 in upper left and 20 on bottom. I wasn't sure if that would be it or CA with a plus 2 in upper right. Am I right, or wrong, or atleast on the right track. There were 3 parts to this question the other asked if an element had 6 electrons, 6 protons, and 6 neutrons, I answered It was C with a 12 upper left and six down the bootm. The third one had 36 electrons, 35 protons and 46 neutrons I had Br with 81 uppper left and 35 down bottom but I think that the answer may be Br with a -1 in upper right.

Explanation / Answer

We Know that : From the given data we can identify the elements as:             2055Ca+2 ,    6 12C ,   3581Br-        Number of protons= Atomic number         Atomic mass = Number of protons + Number of Neutrons         For Neutralelements :           Number of protons = Number of electrons        Number of protons= Atomic number         Atomic mass = Number of protons + Number of Neutrons         For Neutralelements :           Number of protons = Number of electrons

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