What happens when you mix an acid and a base together

Asample contains 16.75 g of the radioisotope u-236 and 50.25 g of its daughter isotope, th-232. how long did it take for decay to take place if one half-life of u-236 is 23 million years? 46 million years 69 million years 92 million years 115 million years

The modern periodic table has groups.

This element exists in adundance in the sun. explain how you would go about capturing sunlight. would this captured sunlight contain any of the element?