Which of the following is not an actinoid?

Thorium Proctanium Moscovium Americium

Moscovium

The correct answer is:(3) Moscovium Moscovium (element 115) is not an actinoid. It is a transactinide element and is part of the group of superheavy synthetic elements, not belonging to the actinoid series. The actinoid series consists of the elements from actinium (element 89) to lawrencium (element 103).