Question

Example 1. An atom of an element A may be written
as 22A
(i) What does the superscript 24 indicate?
(ii) What does the subscript 12 indicate?
(ili) What are the number of protons, neutrons and
electrons in an atom A?
(iv) Write the symbol of ion formed by an atom of
element A​

Answer 1

Answer:

1. No, of proton = no of election = 12

mass no = 0

mass no = sum of proton + neutron

neutron = 12-0

= 12

2.Subscript 12 indicate atomic number.

3.proton x = 4

neutron x = 9-4 = 5

election x = 4.

4. x^2+.

This is your answer friends........... Salmønpanna

Answer 2

Answer:

inb.ox me

Explanation:

Atomic number=No. of protons=No. of electrons in ground state(unchanged atom)

Atomic number=13=No. of protons

Atomic mass=no. of protons+no. of neutrons=13+14=27

For isotope no. of proton=13(same atomic number but different mass number are isotopes)

no. of electrons=13

no. of neutrons=14+2=16