How many neutrons are in the nucleus of an atom that has an atomic mass of 36 and an atomic number of 25

11 neutrons

Explanation:

neutron number= Mass number - Atomic number

given mass number =36

atomic number=25

neutron number=36-25

neutron number=11

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.