Question

a student has written the following symbol . symbol - 1 Mn . symbol - 2 Ca , symbol - 3 Pb symbol - 4 Cr , symbol - Al a] symbol - 1 is correct b] symbol - 2 and 3 are incorret c] symbol -4 is correct d] symbol - 5 is incorrect

Answer 1

Answer:

option a and option c both are correct