Question

three metals from group 1 on the periodic table were tested for reactivity in water. a 1g sample of each metal was placed in ml of water, and observations were recorded in a table. which statement best describes a conclusion that can be drawn from the investigation about the reactivity of metals? a. it is independent of the elements positions on the periodic table. b. it is constant within the group on the periodic table. c. it decreases down a group on the periodic table. d. it increases down a group on the periodic table.

Explanation:

Lithium (atomic number 3) has slight fizzing, sodium (atomic number 11) has moderate fizzing and the beaker is very warm, potassium (atomic number 19) has vigorous fizzing, hot beaker and flames. As we move down Group 1 from lithium to sodium to potassium (increasing atomic number), the reactivity with water increases.

Answer:

D. It increases down a group on the Periodic Table.