What is the formula for speed? JUST DO IT 3.15.13 Daily Riddle   In Question What is the formula for speed?

Today in your notebooks Left side items Right side items States of matter BP States of matter notes Solid, liquid, gas HW Bill Nye phases of matter Phase changes graph Molecular kinetic energy notes Atom diagram, brainpop Atoms notes Element box calculations Element box notes P, N, E practice HW Periodic table PT groups/famillies, PT brainpop PT notes Atomic trends Atomic trends notes Compounds and molecules, BP Bonding notes Atomic arrangements Arrangements notes

Arrangements 3.15.13 Isotope- atoms with different amounts of neutrons. The atomic mass shows the average of all isotopes Electrons are found in the electron shells surrounding an atom 3) Electron shells are arranged as follows: 1st shell- 2 electrons 2nd shell- 8 electrons 3rd shell- 18 electrons *** atoms will be stable if they have 8 electrons in shells 2 and up 4) Valence electron – the outer ring of electrons. These are the bonding electrons. What is an isotope? Where are electrons? 3) How are electrons arranged? 4) What is a valence electron?

Group 1 Group 2 Group 3 Group 15 Group 16 Group 17 1 valence LOSE 1 +1 charge 2 valence LOSE 2 +2 charge 3 valence LOSE 3 +3 charge 5 valence GAIN 3 -3 charge 6 valence GAIN 2 -2 charge 7 valence GAIN 1 -1 charge

Exit slip How many electrons can the first shell hold? A. 1 B. 2 C. 3 D. 4 2. What is a valence electron? Outside electrons B. First electron C. They bond with protons D. They are special and live in the nucleus 3. How many electrons can the second shell hold? A. 2 B. 8 C. 18 D. 32 4. What does the atomic number represent? # of protons B. # of neutrons C. # of protons and neutrons D. # of protons minus electrons 5. What does the atomic mass represent? A. # of protons B. # of neutrons C. # of protons and neutrons D. # of protons minus electrons

Bonding 3.14.13 MOLECULE: Atoms of a single element or different element joined together COMPOUND: one or more molecules joined together CHEMICAL BOND: An attraction between atoms, forms a chemical substance -IONIC bond: a transfer of electrons. Breaks down into ions. -COVALENT bond: a sharing of electrons. Breaks down into molecules 4) POLAR MOLECULE: a molecule with a positive and negative side 1) 2) 3) 4)

DETAILS

Common Ions Ions- Group 1 + Group 17 Group 2 + Group 16

Common compounds Compounds Methane = CH4 Ammonium = NH3 Water = H2O