Which of the following properties increase down a column in the periodic table? (5 points) a
Effective nuclear charge

b
Atomic Size

c
Ionization energy

d
Number of valence shell electrons

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp

When the mercury level in a barometer decreases that atmospheric pressure has

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.