Which element easily gains one electron to form a negative ion? A.
Lithium (Li)

B.
Flourine (F)

C.
Magnesium (Mg)

D.
Nitrogen (N)

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

Calculate the number of molecules present in 0.750 mol of mgo.