To aquire new knowledge solve and answer problems using methods of investigation
I think it’s SO3 I’m not quite sure though
Answer:
see the pic for the answer
Do you need help with all 3 questions or just the one that’s unanswered?
Answer:
17
Explanation:
the mass number of the element which is protons and neutrons is 17+18=35
electronic configuration is 2, 8, 7
valency of the element is 1 therefore the atomic number is 17