The metal lithium crystallizes in a body centered cubic unit cell with one atom per lattice point. when x-rays with λ = 0.7873 å are used, the second-order bragg reflection from a set of parallel planes in a(n) lithium crystal is observed at an angle θ = 12.96°. if the spacing between these planes corresponds to the unit cell length (d = a), calculate the radius of a(n) lithium atom.

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

the answer is c. nacl

5.6⋅10−^19  j

do you need the explaination?