What mass of AgNO3 is used to prepare 500 ml 0.2 M solution Kl solution?

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

One similarity and one difference between an element and a mixture of elements

According to thomson, the atom is a positively charged cloud with electrons scattered throughout. what would the alpha particles do when they hit the foil if thomson were correct