2.01 The Chemistry of Life: Chemistry Review

Describe arts of an atom.

An atom is made of electrons, valence electrons, protons, neutrons, and the nucleus.

What are electrons, valence electrons, protons, and neutrons.

Electrons are negatively charged particles that orbit the nucleus, valence electrons are electrons that orbit the nucleus on the outer level, protons are positively charged particles that make up the nucleus, and neutrons are neutral particles that also make up the nucleus.

Explain the differences between different atoms.

Atoms differ based on the number of protons and electrons they have. More protons makes a positively charged atom, and more electrons make a negatively charged atom.

Explain what elements are and where they exist on earth.

Elements are substances that are made of only one type of atom and they are found in the earth.

Relate the importance of knowing chemistry to an understanding of the processes of life.

Knowing chemistry is important to the understanding of the processes of life because all biological things are made of chemicals in nature.