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5 Written Questions

5 Matching Questions

  1. Difference between covalent and ionic bonds?
  2. What is the atomic mass?
  3. Define the potential energy level of electrons and the Kinetic energy level.
  4. What is a chemical bond?
  5. Difference between an element and a compound?
  1. a The number of protons and neutrons in nucleus.
  2. b Covalent bonds are the SHARING of electrons, whether it be equally or unequally
    Ionic bonds are the GAINING or LOSING of electrons, NOT SHARING
  3. c A compound has characteristics different from those of its elements. Table salt, for example, is sodium chloride (NaCl), a compound composed of the elements sodium (Na) and chlorine (Cl) in a 1:1 ratio. Pure sodium is a metal, and pure chlorine is a poisonous gas. When chemically combined, however, sodium and chlorine form an edible compound.
  4. d Potential energy - stored energy due to location or structure; ready to use energy
    Kinetic energy - energy in motion or movement; currently using
  5. e Atoms interacting with each other to share, take, or give electrons.

5 Multiple Choice Questions

  1. Protons - positive; in nucleus; 1 dalton (or amu)
    Neutrons - neutral; in nucleus; 1 dalton (or amu)
    Electrons - negative; found outside nucleus; 0 nothing
  2. Ex: O - only 6 rings on outer shell, so it wants to gain 2, making it 2- charge
  3. The sharing of electrons EQUALLY; atoms have similar electronegativities
  4. Covalent bonds (STRONGEST) and Ionic bonds.
  5. CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur

5 True/False Questions

  1. What bond do two oxygen's share?Non-polar covalent bond; they have equal electronegativity so they share their e⁻

          

  2. What is an element?A substance that cannot be broken down to other substances by chemical reactions.

          

  3. What are ionic bonds?Electron gaining or losing; e⁻ TRANSFER (NOT SHARING) between two atoms

          

  4. What is a hydrogen bond? Strong or weak?Partial plus of a Hydrogen in a polar molecule forms a bond with a Partial Minus of another polar molecule; Weak bond.

          

  5. Difference between compound and molecule?Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.

          

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