Consider this row in the periodic table of elements. As we move from left to right, across the row, the elements
Responses
A change from nonmetals to metals.change from nonmetals to metals.
B change from metals to nonmetals.change from metals to nonmetals.
C start as gases but end as solids.start as gases but end as solids.
D show a decrease in atomic mass number.show a decrease in atomic mass number.