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5 Written questions

5 Matching questions

  1. Define electrolyte balance.
  2. What is atomic radiation?
  3. What is the relationship between matter and elements?
  4. Explain how electrons are distributed within the electron shell of atoms.
  5. An ionic bond forms when? A covalent bond forms when?
  1. a Energy or atomic fragments they emit.
  2. b All matter is composed of fundamental substances.
  3. c Each electron shell can hold a limited # of electrons. The maximum number of electrons that each of the 1st three shells can hold for elements of atomic number 18 and under is ...1st shell ( close to the nucleus) 2 e-, second shell 8 e-, third shell 8 e-. More complex atoms may have as many as 18 e- in the 3rd shell.
  4. d Ionic: ions with opposite electrical charges attract
    Covalent: a chemical bond between atoms that share electrons.
  5. e The body regularly gains and loses these electrolytes, but they must be present in certain concentrations, both inside and outside cells, to maintain homeostasis.

5 Multiple choice questions

  1. Atoms that have the same atomic number but different atomic weight.
  2. Molecular: consists of the symbols of the elements in the molecule with numerical subscripts that indicate how many atoms of each element are present.
    Structural: representation of the way atoms bond in a molecule.
  3. Simple: sugars include monosaccharaides, disaccharides; straight chains or rings.
    Complex: polysaccharides are built of simple carbohydrates made of many bonded glucose molecules chains of sugars, cant digest.
  4. Chemistry of living organisms, a field of life science.
  5. The solution at pH 6.4 has 100 times the hydrogen ion concentration of a solution at pH 8.42.

5 True/False questions

  1. Explain why some atoms are chemically inert.Synthesis: when 2 or more atoms, ions, or molecules bond to form a more complex structure A+B->AB
    Decomposition: bonds of a reactant molecule break to form simpler molecules, atoms, or ions AB->A+B
    Exchange: parts of 2 different types of molecular trade positions as bonds are broken and new are formed AB + CD-> AD+ BC
    Reversible: product or products can change back to reactant or reactants A+B<-> AB


  2. How does the number of protons in a water molecule compare with the number of electrons?the nucleus of an atom.


  3. What are the general difference between an organic molecule and an inorganic molecule?Organic: compounds have carbon and hydrogen.
    Inorganic: all other chemicals, chemicals that does not include both carbon and hydrogen atoms.


  4. What does the pH scale measure?tracks the number of decimal places in a hydrogen ion concentration without writing them out.


  5. What is an Ion?Atoms that have the same atomic number but different atomic weight.


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