If you started with 20.0 g of a radioisotope and waited for 3 half-lives to pass, then how much would remain?
10.0 g
2.50 g
5.00 g
1.25 g

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

Using the periodic table, complete the table to describe each atom. type in your answers

Particles vibrate in a rigid structure and do not move relative to their neighbors.