In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'. He put the birds softly, (1)/ one by one, interior their (2)/ warm little home. (3)/No Error (4)
If the electronic configuration of elements A and B are respectively, then the formula of the compound formed by the combination of these elements will be: