Which of the following elements is in the same as period as phosphorous? a. magnesium b. nitrogen c. carbon d. oxygen

A.)  Element Phosphorous belongs to group 15 and period 3, magnesium belongs to group 2 and period 3. Hence magnesium is the correct answer. Hope this helps!

Small amounts of matter are converted intolarge amounts of energy occurs in both fusion and fission reactions. they are nuclear reactions where a change in the identity or characteristics of an atomic nucleus results when it is bombarded with an energetic particle, as in fission, fusion, or radioactive decay.