• Chemistry is the basis of life as we know. Everything around you has chemistry• The summarized idea of chemistry is the properties and functions of the smallest units of matter known as atoms.• Atoms are what make up EVERYTHING IN THIS WORLD!!! Even you!!!• Atoms can combine in numerous ways to create compounds that have different properties than just the atoms simply combined.
• The atom is a small unit consisting of three subatomic particles known as protons, electrons, and neutrons.• These three particles are organized with in the atom in a certain way that results in the specific atoms characteristics.
• In an atom, there are positively charged particles called protons, negatively charged particles called electrons, and neutral particles called neutrons. • The protons and neutrons are in the middle of the atom while the electrons circle around this proton/neutron structure called the nucleus. • Every different atom on the periodic table has a differ number of these Atoms percent weight particles. graphProtons Electrons
• The periodic table is what chemists use to show specific types of atoms• It is organized by the properties of the atoms, number of subatomic particles of the atom, and size of the atom.• Going across the periodic table is going through its groups while going down it is going across periods.• These atoms that are on the periodic table are called elements; every atom of an element is the same, but atoms of different elements are different.
• Numbers and symbols on the periodic table usually tell a number of properties of an atom.• The one or two letter symbol tells us the name of the atom Ex: C= Carbon• The atomic number (the number on top of the element) is the number of protons and electrons in the atom of that element since the elements usually have a neutral overall charge Ex: Carbon’s is 6 so it has 6 protons and electrons.• The atomic weight (the number below the element symbol) is used by subtracting the number of protons from it (the atomic number) and equaling the number of neutrons Ex: Carbon’s is 12 so 12-- 6= 6 so carbon has six neutrons.
• The periodic table is not only sorted by increasing numbers of particles but it is also organized into types of metals and special groups• To the left of the table you will find the metals in groups 1-2A• In groups 3B – 2B is all transition metals• Below a diagonal line from group 3A’s boron to 6A’s Tellurium is where you will find the metalloids.• Above that line is where the nonmetals are.
• All groups except for the ones in the transition metals and metalloids all have similar characteristics• 1A is the alkali metals• 2A is the alkali earth metals• 6A is the calcogens• 7A is the halogens• 8A is the noble gases which are the most stable elements on the table meaning they do not like to change
• This is what the people in the field of chemistry deal with on a daily basis• The elements are to great importance to us because, everything is made up of one or more of these elements• Learning these concepts in chemistry may even interest you into a certain career field• Doctors, physicians, physical therapist, and etc. all have to know and work with chemistry• Most of all YOU WILL BE DEALING WITH IT A LOT MORE IN LATER EDUCATION!