Explain why the electron configuration of: a. Chromium is (Ar) 3d5 4si and not [Ar]3d4 4s2
b. Copper is [Ar] 3d104si and not [Ar] 3d, 4s2

PLIZ HELP

Which of the following represents the results of a review of well-controlled studies of vitamin c supplementation on the resistance to, and recovery from, colds? there was a reduction in the duration of colds by 50% on the average. there was a slight effect on reducing the duration and severity of colds for people taking vitamin c supplements. there was a significant reduction in the duration of colds in people who consumed at least one gram a day. there was a significant reduction in the number of colds only in people who consumed > three grams per day.

An _ exposure is a repeated or prolonged exposure(over months or years) that may bring about slowly developing symptoms.

If mary has stopped her resistance training for three weeks, once she continues, she should work out harder to get back in shape keep her workout the same as before her break reduce the weight during the workout session reduce the rest times between sets