Chemistry of Living Things Part 1 Basic Chemistry

What is Chemistry? Chemistry is the study of matter. Matter is anything that has mass and takes up space.

What is an atom? An atom is the smallest unit of matter. An atom can NOT be divided any smaller

What is an element? Any substance that is made up of one kind of atom is an element. Examples of Elements: Gold Copper Iron Oxygen Hydrogen Do you know any other elements? _________________________________ All elements are presented by symbols. Oxygen – O Carbon – C Iron – Fe All known elements are on the Periodic Table.

What is an element?

What is a molecule? A molecule is made up of 2 or more atoms. Some molecules are made up of millions of atoms. Atoms are held together by bonds. Water Molecule: 2 hydrogen atoms 1 oxygen atom No! Not 007 James Bond Bond

What are bonds? Bonds connect or join atoms together. When bonds are broken, energy is released. Bond Bond

What are compounds? A compound is a substance made of atoms. The elements in compounds lose their own properties. For example: The elements hydrogen & oxygen are both gases. When 2 hydrogen atoms bond with 1 oxygen atom it forms a liquid...WATER! Water is a compound! H2O List as many other compounds as you can? __________________________________

What are Chemical Formulas? A chemical formula is a short way of writing a compound. Just like each element has its own chemical symbol, each compound has its own formula.

What does a chemical formula included? A chemical formula tell us: The elements in the compound How many atoms of each element For example: The chemical formula for carbon dioxide Co2 1 carbon atom and 2 oxygen atoms.

What is a chemical equation? A chemical equation shows the starting reactants and the end products of a chemical reaction. Reactants – The “ingredients” needed for a chemical reaction. Products – What is created after the chemical reaction.

What is an example of a chemical equation? Na +Cl2 2NaCl Reactants Products Reactants : Na + Cl2 or Sodium & Chloride Products: 2NaCl or Sodium Chloride (salt)

What are the Reactants & Products? Chemical equation for photosynthesis – 6 CO2 + 6 H2O → C6H12O6 + 6 O2  Reactants Products Identify the reactants of photosynthesis – 6CO2 + 6 H20 or Carbon Dioxide + Water Identify the products of photosynthesis – C6H12O6 + 6O2 or Glucose + Oxygen

What does chemistry have to do with living things? Let’s watch the BrainPOP to find out! Click the link below Brainpop: Body Chemistry