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5 Written questions

5 Matching questions

  1. Define Subatomic particles, their charges, where they're found, and their relative mass.
  2. What are isotopes?
  3. What are valence electrons?
  4. Difference between compound and molecule?
  5. What are trace elements?
  1. a Different forms of the same element; they differ in number of neutrons, but they have the same # of protons and behave identically in chemical reactions
  2. b Protons - positive; in nucleus; 1 dalton (or amu)
    Neutrons - neutral; in nucleus; 1 dalton (or amu)
    Electrons - negative; found outside nucleus; 0 nothing
  3. c Compound is a mixture of at least two different elements, while a molecule is a 2 or more atoms of a single element.
  4. d The electrons on the outermost orbital shell
  5. e Elements required by organisms in minute quantities; ex: humans need iodine in small quantities or we'll get goiter

5 Multiple choice questions

  1. Weak.
  2. Ex: O - only 6 rings on outer shell, so it wants to gain 2, making it 2- charge
  3. a substance consisting of two or more different elements combined in a fixed ratio.
  4. Covalent bonds (STRONGEST) and Ionic bonds.
  5. Electron gaining or losing; e⁻ TRANSFER (NOT SHARING) between two atoms

5 True/False questions

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

          

  2. What is a chemical bond?a substance consisting of two or more different elements combined in a fixed ratio.

          

  3. What is electronegativity?The number of protons in an atom.

          

  4. What are our 6 Essential Elements?CHNOPS: Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur

          

  5. Difference between an element and a compound?Covalent bonds are the SHARING of electrons, whether it be equally or unequally
    Ionic bonds are the GAINING or LOSING of electrons, NOT SHARING