Ch 3 Homework

Which formulas represent ionic compounds and which represent covalent compounds?

Covalent: C6h5N, C2h4O, PCI3 Ionic: CdBr2, CaO, CsF, Na2O, WO2

_____ are either positively charged or negatively charged species in which the number of protons and electrons are not equal.

Ions

Identify the ion with the given number of protons and electrons. 12 protons and 10 electrons: 25 protons and 21 electrons: 35 protons and 36 electrons: 15 protons and 18 electrons: 47 protons and 46 electrons: 79 protons and 76 electrons:

Mg2+ Mn4+ Br- P3- Ag+ Au3+

Write a suitable formula for the following compounds. Be sure to answer all parts. sodium nitrate magnesium nitrate

NaNO3 Mg(NO3)2

________ is the system of assigning an unambiguous name to a compound.

Nomenclature

Which of the following compounds have polar bonds but are nonpolar covalent compounds?

SiO2 and SiCl4

_______ are positively charged ions with more ______ than _________.

cations, protons, and electrons

_____ bonds are chemical bonds that results from the sharing of electrons.

covalent

Name the following ion: H3O+

hydronium ion

_________ ion is an example of a polyatomic anion.

hydroxide

Using the VSEPR theory, predict the geometry, polarity, and water solubility of the compound below. Geometry around C: Geometry around O: Polarity: Water-solubility:

tetrahedral angular polar soluble