Which elements have similar chemical properties? a) Na, K, Mg
b) B, Al, S
c) N, O, F
d) He, Ar, Kr

d) He, Ar, Kr

Explanation:

To have similar chemical properties, elements must belong to the same period on the periodic table.

As a generally periodic trend, elements within the same group, have the same chemical properties.

So, the correct answer choice will draft elements from the same group.

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).