a. Ionic bonds share electrons equally, covalent bonds donate electrons.
b. ionic bonds donate electrons, covalent bonds share electrons equally.
c. ionic bonds do not donate or share electrons, covalent bonds donate electrons.
d. none of the above.
A. shells 1 and 2 are full, and shell 3 has nine electrons
B. shells 1, 2 and 3 are full and shell 4 has three electrons
C. shells 1, 2 and 3 are full and shell 4 has one electron
D. shells 1, 2 and 3 are full and no other electrons are present
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A circuit is constructed with an AC generator, a resistor, a capacitor, and an inductor as shown. The generator voltage varies in time as =-=sin(t), where =120V and =737rad/s. The values for the remaining circuit components are: R = 83, L = 112.5mH, and C = 11.6F. What is Z, the impedance of the circuit?
Mrs. Helen Schreiber, a 45-year-old high school principal, presents with a 6-month history of dry mouth, bleeding gums, and difficulty in chewing and swallowing food.
Questioning by Dr. Susan Lee, her primary care physician, reveals that she also has dry eyes, is having pain in some joints of both hands, and has felt fatigued. Her previous medical history is uneventful. Physical examination shows a dry mouth, mild gingivitis, and an ulcer on the back of the lower lip. Her salivary glands are not swollen. Her eyes show no ulceration or conjunctivitis. The metacarpophalangeal joints of both index fingers are swollen, stiff, and tender. All other systems show no abnormality.
Initial laboratory reports show anemia, decreased WBC count, and an elevated ESR. Dr. Lee makes a provisional diagnosis of Sjogren syndrome. The results of blood studies for SSA and SSB antibodies and for rheumatoid factor titers are pending, as are -rays of her hands. Mrs. Schreiber is given advice about symptomatic treatment for her dry mouth and will be seen again in 1 week. Luisa Guitterez, CMA. 10/12/12, 1530 hrs.
Answer the following question.
Which other body systems are presenting symptoms?