A covalent bond is best described as A) the sharing of electrons between atoms. B) the transfer of electrons. C) a bond between a metal and a nonmetal. D) a bond between a metal and a polyatomic ion. E) a bond between two polyatomic ions.

What is the main function of the bone marrow?

Give the complete electronic configuration for Br-. A) 1s2  2s2  2p6 3s2 3p6 4s2 4p6 B) 1s2  2s2  2p6 3s2  3p6  4s2  4d10  4p6 C) 1s2  2s2  2p6  3s2 3p6  4s2  3d10  4p6 D) 1s2 2s2  2p6  3s2  3p6  4s2  3d10  4p5 E) 1s2 2s2  2p6  3s2    3p6 4s2  3d10  4p4

Which of the following statements is TRUE? A) The emission spectrum of a particular element is always the same and can be used to identify the element. B) Part of the Bohr model proposed that electrons in the hydrogen atom are located in “stationary states” or particular orbits around the nucleus. C) The uncertainty principle states that we can never know both the exact location and speed of an electron. D) An orbital is the volume in which we are most likely to find an electron. E) All of the above are true.  

Determine the name for N2O5. A) dinitrogen pentoxide B) nitrogen oxide C) nitrogen (IV) oxide D) nitrogen (II) oxide E) nitrogen tetroxide

An ionic bond is best described as A) the sharing of electrons. B) the transfer of electrons from one atom to another. C) the attraction that holds the atoms together in a polyatomic ion. D) the attraction between 2 nonmetal atoms. E) the attraction between 2 metal atoms.

A double covalent bond contains ________ of electrons. A) 0 pairs B) 1 pair C) 2 pairs D) 3 pairs E) 4 pairs

Determine the electron geometry (eg) and molecular geometry (mg) of CO32⁻. A) eg = tetrahedral, mg = tetrahedral B) eg = tetrahedral, mg = trigonal pyramidal C) eg = trigonal planar, mg = bent D) eg = trigonal planar, mg = trigonal planar E) eg = tetrahedral, mg = trigonal planar

All of the following will lead to a homogeneous mixture EXCEPT   A) sugar and coffee. B) mud and water. C) salt and water. D) ice tea and lemonade. E) vinegar and water.

Heparin therapy is most effective in the __________ state of DIC with evident vascular thrombosis.