All the following are true EXCEPT A. Atomic radius of Na < atomic radius of Mg

B. electronegativity of C > electronegativity of B

C. 1st ionization energy of K > first ionization energy of Rb.

D. lonic radius of Br"> atomic radius of Br

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

Displacement is the slope of a velocity vs. time graph a. true b. false

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.