Name the process that changes matter into one or more new substances

Melatonin is an animal hormone believed to have a role in regulating the sleep cycle: The structure of melatonin incorporates two nitrogen atoms. What are the hybridization state and geometry of each nitrogen atom? Explain your answer.

1. what happens in the nucleus of an atom when an alpha particle is emitted? 2. what happens in the nucleus of an atom when a beta particle is emitted?

Hydrogen has three isotopes with mass numbers of 1, 2, and 3 and has an average atomic mass of 1.00794 amu. This information indicates that 1. equal numbers of each isotope are present 2. more isotopes have an atomic mass of 2 or 3 than of 1 3.

This element: -has electrons in d sublevel -is the heaviest named element in its group -is a shiny metal used for jewelry does anyone know which element it is?

Since the new oceanic crust is created at the mid-ocean ridges, then the Earth is getting bigger. True False

What substance is not a compound

Consider the following exothermic reaction and predict how the change below will affect the concentration (increase, decrease, stay the same) of each component in the system as the equilibrium is reestablished.

How does the electron structure of atoms change when they form chemical bonds

What is the scientific notation for 1073

What is the force that opposes the sliding motion of two touching surfaces?