Chemistry - interaction of matter

atoms → molecules → cells

atoms assemble and bond to make molecules

a slew of different type of molecules can make cells

• Many physiology processes are performed by chemical reactions/interactions

Elements

• Pure substance with all the same atom
• Periodic Table contains all the known elements

• The type of element is determined by the number of protons in the nucleus, known as the atomic number.

• Element: One of ninety-two distinct substances, each with unique chemical properties. (A subatomic particle)!!!!!!!!!
• Atom: Particle consisting of nucleus and orbiting electrons.
• Molecule: Particle formed by chemical bonding of two or more atoms.
• Matter: Anything with weight and that takes up space. • Mixtures: Matter can also be mixtures, which are combinations of pure substances that retain their individual properties and can be separated by physical means.

1. Anything that has weight and takes up space is defined as matter, which is composed of many different types of elements.
2. Different elements, such as oxygen and hydrogen, are composed of particles called atoms, each with a structure unique to that element (unique numbers of protons, neutrons, and electrons).
3. Atoms can combine to form larger particles called molecules. Atoms combine by forming attractions called chemical bonds.