Atomic Structure Notes PDF

Atomic Structure Notes Atoms: - Smallest particle of an element that has all the properties of that element. - -Atoms are the basic building blocks of matter that make up everyday objects. -2 main parts of an atom: Nucleus-99.9% of the atom’s mass Electron cloud or energy rings -Atoms a...

Atomic Structure Notes Atoms: - Smallest particle of an element that has all the properties of that element. - -Atoms are the basic building blocks of matter that make up everyday objects. -2 main parts of an atom: Nucleus-99.9% of the atom’s mass Electron cloud or energy rings -Atoms are made of subatomic particles: protons, neutrons, & electrons Atoms are composed of three primary particles: protons, neutrons, and electrons Relative How do you Electrical Particle Symbol Location Mass find out Charge (amu) how many? Electron Proton Neutron Atoms are composed of three primary particles: protons, neutrons, and electrons Relative How do you Electrical Particle Symbol Location Mass find out Charge (amu) how many? Atoms are Orbits neutral and nucleus in -1 1/1840 therefore e- have the Electron energy (negative) levels same # of electrons as protons Atomic # (# of protons Inside +1 in an atom’s Proton P+ 1 nucleus), Nucleus (positive) Element specific 0 Mass # Neutron no Inside (no charge/ 1 minus Nucleus neutral) atomic #  Electron Energy Levels There is a unique number of electrons that can fit in each electron level. Energy Level How many electrons it holds up to 1 2 2 8 3 18 Determining Atomic Structure Using the Periodic Table Chemical Symbol Element Name B Atomic Number 5 Atomic Mass #: The Boron weighted average mass of all the isotopes (different versions) of an atom of a specific element; 10.81 measured in atomic mass units, amu. Mass #: Atomic Mass Number rounded to the nearest whole number. ATOMIC STRUCTURE DIAGRAMS 5 P=5 N=6 Step 1: Complete the squares for each element by adding the atomic B E=5 number, name and atomic mass. Boron - Write the atomic number at the top of the square. 10.81 - Write the element’s name under the symbol. - Write the atomic mass at the bottom of the square. Atomic Structure: Step 2: Determine the number of protons, neutrons, and electrons in each element. 5 P+ 6 no Step 3: Create an atomic structure diagram for each element. Step 4: Draw the Bonding Structure for each element. Bonding Structure: B