Question

Which one of the following is statement is not correct about the trends in properties ​

Answer 1

Answer:

(c) part is incorrect,a group tells us about the valence of the elements listed under it,for eg Na is in group 1 hence its valence is 1.Similarly since Mg is in group 2,the valency of Mg is 2,and hence the total no of valence electrons of Mg=2.Take another case -of Be, again it belongs to group 2 and has 2 valence electrons.