which of these is not a s-block element?
S-block element - 14 elements that are located in the leftmost part of the modern table Mendeleva (1 and 2 columns) and Helium, which is located in the upper right corner of the table. Potassium, Calcium and magnesium are the first and second column, and Zinc - is placed on a column 12, which indicates that the zinc is not an element S-block. Also, all the valence electrons are s-elements are in s-orbitals. This can be confirmed by the example of potassium, calcium, magnesium; and Zinc the valence electrons are in the d-orbitals. Answer: c (Zn)