An isotope has a half life of 5 minutes. How much of a 100 gram sample of this isotope is left after 20 minutes?

Why is the structure of molecule important to its function?

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

The term gas is limited to those substances that exist in the gaseous state at