If we remove electrons from a neutral atom of calcium until we have removed 3 electrons, what best describes the effective nuclear charge as we add each electron? a
stays the same, decreases, stays the same
b
stays the same throughout
c
stays the same, increase, stays the same
d
decreases, stays the same, increases
e
decreases, decreases, stays the same
f
increases, stays the same, decreases

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.

Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. trial 1: trial 2: data mass of empty crucible with lid trial 1: 26.688 trial 2: 26.681 mass of mg metal, crucible, and lid trial 1: 26.994 trial: 2 26.985 mass of mgo, crucible, and lid trial 1: 27.188 trial 2: 27.180

How many grams of iron can be made from 16.5 grams of fe2o3