Question

hydrogen has been placed at the top of the first column of the periodic table. hydrogen does not share most of the properties of elements in this column. hydrogen is placed in this position partly because it does share one property with these elements, an outermost shell that contains

a. zero valence electrons.
b. one valence electron.
c. two valence electrons.
d. three valence electrons.

Explanation:

Hydrogen has atomic number 1, so it has 1 valence electron like other group - 1 elements.

Answer:

B. one valence electron