When the amount of a radioactive substance is reduced by 50%, what has occurred?

gamma radiation

alpha radiation

a half-life

beta radiation

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.

Based on the equation and the information in the table, what is the enthalpy of the reaction?

All cells are made of four types of acids, lipids, proteins, and carbohydrates.