When comparing the number of protons and electrons, a neutral atom has _____
the same number of electrons and protons
fewer protons than electrons
fewer electrons than protons
twice as many protons as electrons
A. the same number of electrons and protons
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Magnesium chloride is a salt formed with ionic bonds between one magnesium ion and two chloride ions. Magnesium has two electrons in its outer shell and chlorine has seven electrons in its outer shell. How are the electrons transferred between these atoms?
A. Both magnesium and chlorine are reduced. B. Magnesium is oxidized and chlorine is reduced. C. Chlorine is oxidized and magnesium is reduced. D. Both magnesium and chlorine are oxidized.
All nucleated cells contain
A. IgE receptors. B. class II MHC. C. class I MHC. D. IgD receptors. E. secretory antibodies.
Protein hormones include
a. estrogens. b. growth hormone. c. melatonin. d. thyroid hormone. e. oxytocin.
At the isoelectric pH of a tetrapeptide:
A) only the amino and carboxyl termini contribute charge. B) the amino and carboxyl termini are not charged. C) the total net charge is zero. D) there are four ionic charges. E) two internal amino acids of the tetrapeptide cannot have ionizable R groups