Question

How many elements are present in 5
th period ?​

Answer 1

The fifth period contains 18 elements, beginning with rubidium and ending with xenon. As a rule, period 5 elements fill their 5s shells first, then their 4d, and 5p shells, in that order; however, there are exceptions, such as rhodium.

Answer 2

Answer:

The fifth period contains 18 elements,

Explanation:

please mark me as a brainliest