To find the number of neutrons in an element, we can subtract the atomic number from the mass number.

Given:

Mass number = 244

Atomic number = 94 (represents the number of protons)

Number of neutrons = Mass number - Atomic number

Number of neutrons = 244 - 94

Number of neutrons = 150

Therefore, the element with a mass number of 244 and atomic number 94 has 150 neutrons.