With a half-life of 28.8 years, how long will it take for 2000 mg of strontium-90 to decay to 125 mg? Response areaResponse areaResponse area years

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.