Silane, SiH., is a colorless, pyrophoric, toxic gas that is used to deposit elemental silicon for semiconductor and photovoltaic applications. Based on its tetrahedral molecular geometry, is the molecule polar? A) Yes, the molecule is polar. B) No, the molecule is not polar. C) Depending of how the atoms are connected, the molecule can be polar or nonpolar.

Following is a molecule with polar bonds whose shape was obtained using the VSEPR theory. Specify the molecular shape of this molecule, and whether the molecule is polar or nonpolar. (Hint: In terms of polarity, see whether the dipoles in the molecule cancel or not. A molecule containing polar bonds can be nanpolar if the dipoles cancel each other. You can imagine the dipoles as ropes pulling on the central atom–If the pulls cancel each other, that is, the central atom cannot move, then the molecule is nonpolar. If on the other hand the opposite is true, then the molecule is polar.) O trigonal pyramidal shape, nonpolar O trigonal planar shape, nonpolar O tetrahedral shape, polar O trigonal pyramidal shape, polar O trigonal planar shape, polar

Which of the following has two valence electrons? A) hydrogen B) carbon C) aluminum D) strontium

1. For each pair of elements listed determine if they will form an ionic (I) or covalent (C) bond.    2.General Properties of Ionic and Covalent Compounds (Use THIS LINK to complete the table)  https://www.thoughtco.com/ionic-and-covalent-compounds-properties-3975966