ChemistryHomework-1 - Microbiology MCB 2010C VCC Chemistry...

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Microbiology MCB 2010C Name ________________________ VCC Chemistry Unit Worksheet Lab ___________ The study of biology in the 21 st century is actually the study of biochemistry. In order to be successful in this course, it is important that you understand basic chemistry principles. Students who do not show a mastery of these principles may be starting their college careers at an inappropriate level of biology and may want to reconsider by starting their college career at a more appropriate level by taking BSC 1005. You will have the first 2 weeks of this course to demonstrate your abilities by answering these basic chemistry concepts which will assist you in reaching your health related professional career goals. The following sources should be of assistance in helping you to answer the worksheet questions: 1. Your textbook for the course (Chapter 2: Chemical Principles) 2. The Chemistry of Life CD-ROM ATOMIC STRUCTURE Solids, liquids and gases are all forms of matter. Matter is anything that has mass and takes up space. On earth, all matter is made of 92 naturally occurring elements, such as carbon, oxygen, hydrogen, nitrogen and gold. Each element is made of atoms; atoms are the smallest unit of an element that retains all the properties of that element. QUESTION 1 Draw and label the parts of an atom, showing the location of protons, neutrons and electrons. Indicate the electrical charge of each of these subatomic particles. QUESTION 2 Aluminum atoms have a total of thirteen electrons. a. Draw the 3 electrons shells found in an aluminum atom. b. Draw where you would find the electrons in an aluminum atom. c. Label which shell is the valence shell. 1
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QUESTION 3 a. The number of _______________ in the nucleus determines an element’s atomic number. This number defines the name of the element, no other element shares that atomic number. b. The number of _________________ and __________________ in the nucleus of an atom determines an element’s mass number. c. In an uncharged or neutral atom, the number of electrons is (CIRCLE ONE: greater than, less than, equal to) the number of protons in that atom. d. The chemical reactivity of an element, how one atom bonds to another atom to make a molecule, is determined by the arrangement of the _______________________ shell of electrons. e. The first electron shell of an atom can hold up to ____ electrons; the second and third electron shells can hold up to _____ electrons each. When filling electron shells, the electrons fill the innermost shell first, continue filling the second shell next and then fill each successive electron shell moving out from the nucleus. Fill in the following table based on the information provided. Atomic
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ChemistryHomework-1 - Microbiology MCB 2010C VCC Chemistry...

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