In the neutral Al atom, what are the effective nuclear charges for a 1s electron and a valence electron, respectively?1+12; +32+10; +133+12; +124+13; +35+3; +3
An estimate of effective nuclear charge can be obtained from Zeff Z - S, where Zeff effective nuclear charge, Z atomic number, and, S the screening constant for aluminum's valency electron z13, aluminum is 1s2 2s2 2p6 3s3 so 10 electrons screening it from nucleus so S the screening constant 10 for alluminium's valency electron for 1st electron is Zeff Z - S 13-013 answer is 13 and 3 the 4th option
Green tea is good, just don't add sugar and cream to it.
five cups of tea is not unhealthy in any respectthere are plenty of advantages in tea, for frame and soulbodily: the antioxidants in tea are cleansing your procedure from the loose radicalsthe volume of caffeine is not prime - a well indication might be if you're napping goodmentally: do not underestimate the endeavor of sipping to your cup, it offers satisfaction and calmness and is a well strain relievera few suggetions: one million- ensure you drink water as your procedure won't get thirsty however you continue to want that liquidtwo- check out Rooibos tea ( they name it the miracle tea), it has no caffeine, double the volume of antioxidants and it takes milk good ( I find it irresistible with out).
That amount of tea is perfectly healthy.
