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Chem 2nd 9 Weeks Ex
| Question | Answer |
|---|---|
| Who's model of the atoms describes the electrons as moving very fast and creating a cloud of negative charge around the outside of the positive nucleus, yet staying in certain probable locations based on their energy? | Neil Bohr |
| Who based their model of the atom off the energy released by elements when they absorb and release energy of certain wavelengths creating specific bright line emission spectra? | Neil Bohr |
| What was the lab we preformed that allowed us to see the different spectra of light released by the electrons of different elements as they gained and lost energy? | Flame Test |
| The number of protons in an atom is called? | The atomic number |
| The number of protons + neutrons is called? | The mass number |
| What happens to the atomic number as you move across the periodic table from left to right? | The number increases |
| What happens to the atomic number as you move down the periodic table? | The number increases |
| What happens to the size of metal atoms (atomic radii) as you move across the periodic table from left to right? | It gets smaller |
| What happens to the size of atoms as you move down a column? | It gets bigger |
| What term refers to the electrons in the outer energy level/ shell of atoms? | Valence |
| Which type of properties can be observed without changing the substance and include, color. state, density, ductility, mailability, conductivity, specific gravity, melting point, boiling point, and solubility? | Physical Properties |
| What is the collective name of the elements found to the left of the staircase on the periodic table that are typically solids at room temperature? | Metals |
| What is the collective name of the elements found to the right of the staircase on the periodic table that are typically gases at room temperature? | Nonmetals |
| What is the collective name of the elements that touch the staircase on the periodic table and are good conductors with properties of both metals and nonmetals? | Metalloids |
| The ability's of metals to allow electrons to move through their electron clouds to transfer electrons (electricity) and energy from one point to another is called? | Conductivity |
| A measure of an atoms ability to attract electrons is called? | Electronegativity |
| The amount of energy needed to take an electron away from an atom is called? | Ionization |
| The amount of energy released when an atom gains an electron is called? | Electron Affinity |
| Metals tend to have ___ electronegativities, electron affinities, and ionization energies. | Low |
| Why do metals have low electronegativities, electron affinities, and ionization energies? | They lose electrons, not gain |
| Nonmetals tend to have ____ electronegativities, electron affinities, and ionization energies? | High |
| Why do nonmetals have low electronegativities, electron affinities, and ionization energies? | They gain electrons, not lose |
| Which type of substance is formed when two atoms transfer electrons? | Ionic Compound |
| Which type of substance is formed when two atoms share electrons? | Covalent Molecule |
| What is used to determine whether or not atoms will form ionic or covalent bonds? | Electronegativity Differences. If the difference is high, an ionic bond forms, if the difference is low, a covalent bond forms. |
| Which type of bond forms if the atoms share the electrons equally? | Non-polar Covalent |
| Which type of bond forms if the atoms share the electrons unequally? | Polar Covalent |
| What is the name of the vertical columns on the periodic table? | Groups/ Families |
| What is the name of the horizontal rows on the periodic table? | Periods/ Series |
| Group 1 elements? | Alkaline |
| Alkaline oxidation number? | +1 |
| Group 2 elements? | Alkaline Earth |
| Alkaline Earth oxidation number? | +2 |
| Group 3-12 elements? | Transition Metals |
| Group 13 oxidation number? | +3 |
| Group 14 oxidation number? | + or - 4 |
| Group 15 oxidation number? | -3 |
| Group 16 elements? | Chalcogens |
| Group 16 oxidation number? | -2 |
| Group 17 elements? | Halogens |
| Group 17 oxidation number? | -1 |
| Group 18 elements? | Noble Gases |
| Group 18 oxidation number? | 0 |
| Why 0? | Stable and full |
| Lewis electron dot diagrams are drawn to show the _______ electrons of an element and to predict their oxidation numbers and bonding patterns. | Valence |
| An element with 7 valence electrons is likely to ____ one electron. | Gain |
| An element with 1 valence electron is likely to ____ one electron | Lose |
| An element like carbon with 4 valence electrons is likely to form four ______ bonds by sharing one electrons with each of four other atoms. | Covalent |
| What is VSEPR? | Valence Share Electron Pair Repulsion |
| Why is water a bent molecule? | 2 unshared pairs of electrons that push shared pairs down. |
| Where on the periodic table is the most metallic element? | Lower Left |
| Where on the periodic table is the most nonmetallic element? | Upper Right |
| Most electronegative: Iodine or fluorine? | Fluorine |
| Most electronegaive: Oxygen or fluorine? | Fluorine |
| mono | 1 |
| di | 2 |
| tri | 3 |
| tetra | 4 |
| penta | 5 |
| hexa | 6 |
| hepta | 7 |
| octa | 8 |
| nona | 9 |
| deca | 10 |
| Binary Molecules | |
| N2O5 | dinitrogen pent oxide |
| SCl6 | sulfur hexachloride |
| Molecoules | |
| Triphosurus tetrafluroide | PbF4 |
| Binary Compounds | |
| NaF | Sodium Fluoride |
| BaCl2 | Baruim Chloride |
| Mg3P2 | Magnesium Phosphide |
| Lithium Nitride | Li3N |
| Calcium Sulfide | CaS |
| Binary Acids |
Created by:
sbheath
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