PLEASE ANSWER 30 POINTS !! (This is the same question, sorry for not putting the picture, please help !)

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

What can be found in the ionosphere

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent