An atom of carbon has an atomic number of 6 and a mass number of 12. Predict how many hydrogen atoms must covalently bond with carbon to satisfy carbon's octet rule. Hydrogen has an atomic number of 1
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Carbon has an atomic number of 6. A neutral atom of carbon has 6 protons and 6 electrons. Four of those six electrons are situated in carbon's valence, or outermost, shell. Four more electrons would be needed to satisfy the octet rule. Hydrogen has an atomic number of 1. A neutral atom of hydrogen has 1 proton and 1 electron. The sole electron is situated in hydrogen's only shell. Each hydrogen atom can share one electron with the carbon atom. Four hydrogen atoms are needed to form four covalent bonds and share electrons with the carbon atom.
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Some bone interiors contain hemopoietic tissue, which functions in
A. producing blood cells. B. storing fat. C. breaking down toxins. D. making connective tissue fibers. E. producing hormones.
What is the main function of the colon?
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Which of the following is NOT true of the epicranius muscle?
A. It consists of the frontalis and the occipitalis. B. It is considered to be a muscle of mastication. C. Its 2 portions are connected by a large aponeurosis. D. It acts to raise the eyebrows and retract the scalp. E. All of these are true of the epicranius muscle.
Which of the following is NOT a factor that influences the rate of gas diffusion through the respiratory membrane?
A. the partial pressure gradient of the gases B. the thickness of the respiratory membrane C. the diffusion coefficient of the gases D. the temperature of the gases E. the surface area of the membrane