Question

An atom of an element A may be written as 1224A.
(a) What does the superscript 24 indicate?
(b) What does the subscript 12 indicate?
(c) What are the number of protons and neutrons in an atom A?
(d) Write the symbol of ion formed by an atom of electrica​

Answer 1

Answer:

superscript 24 indicates atomic weight

subscript 12 indicates atomic number

there are 12 protons and 12 neutrons in atom A

Answer 2

Answer:

12 atomic number

24 mass number