The graph below shows the radioactive decay of potassium whose half life is 1.25 billion years.

graph with amount of radioactive potassium present (in grams) plotted on y axis and number of half-lives plotted on x axis. the points (0, 1000), (1, 500), (2, 250), (3, 125), and (4, 62.5) have been joined using a smooth curve.

in your own words, summarize the information provided by the graph about the radioactive decay of potassium.

Identify which properties could correspond to solids, plasmas, or both. maintain a unique shape. collide infrequently with other particles. have very high velocities. conduct electricity. protons. have a low temperature. has long-range order.

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

Identify two types of chemical bonding in the source of dietary potassium