Strontium is in Group 2 of the periodic table. Which number of electrons must be gained or lost for strontium to form a complete valence shell? A. 2 gained
B. 2 lost
C. 6 gained
D. 6 lost

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.