Write the molecular and structural formulas for the compounds represented by the following models:

Fill in the gaps in the following table: Symbol 59Co3+ Protons 34 76 80 Neutrons 46 116 120 Electrons 36 78 Net charge 2+

Fill in the gaps in the following table:

Symbol 31P3-

Protons 34 50

Neutrons 45 69 118

Electrons 46 76

Net charge 2- 3+

Each of the following elements is capable of forming an ion in chemical reactions. By referring to the periodic table, predict the charge of the most stable ion of each: c. K

Using the periodic table, predict the charge of the most stable ion of the following elements: d. Br

Using the periodic table, predict the charge of the most stable ion of the following elements: e. Se

Using the periodic table to guide you, predict the chemical formula and name of the compound formed by the following elements: (a) Ga and F (b) Li and H

Using the periodic table to guide you, predict the chemical formula and name of the compound formed by the following elements: (c) Al and I

Using the periodic table to guide you, predict the chemical formula and name of the compound formed by the following elements: (d) K and S.

The most common charge associated with scandium in its compounds is . Indicate the chemical formulas you would expect for compounds formed between scandium and b. sulfur

Predict the chemical formula for the ionic compound formed by (a) Ca2+ and Br-

Predict the chemical formula for the ionic compound formed by (b) K+ and CO32-

Predict the chemical formula for the ionic compound formed by (c) Al3+ and CH3COO-

Predict the chemical formula for the ionic compound formed by (d) NH4+ and SO42-

Predict the chemical formula for the ionic compound formed by (e) Mg2+ and PO43-.

Predict the chemical formulas of the compounds formed by the following pairs of ions: (b) Fe3+ and O2-

Predict the chemical formulas of the compounds formed by the following pairs of ions: (c) Hg22+ and CO32-

Predict the chemical formulas of the compounds formed by the following pairs of ions: (d) Ca2+ and ClO3-

Predict the chemical formulas of the compounds formed by the following pairs of ions: (e) NH4+ and PO43-.

Complete the table by filling in the formula for the ionic compound formed by each pair of cations and anions, as shown for the first pair. Ion K⁺ NH₄⁺ Mg²⁺ Fe³⁺ Cl^- KCl OH^- CO₃^2- PO₄^3-

Complete the first row of the table.

Complete the second row of the table.

Complete the third row of the table.

Complete the fourth row of the table.

Complete the table by filling in the formula for the ionic compound formed by each pair of cations and anions, as shown for the first pair. Ion Na+ Ca2+ Fe2+ Al3+ O2- Na2O NO3- SO42- AsO43-

Predict whether each of the following compounds is molecular or ionic: (a) B2H6

Predict whether each of the following compounds is molecular or ionic: (b) CH3OH

Predict whether each of the following compounds is molecular or ionic: (e) CsBr

Predict whether each of the following compounds is molecular or ionic: (f) NOCl

Predict whether each of the following compounds is molecular or ionic: (h) Ag2SO4.

Predict whether each of the following compounds is molecular or ionic. a. PF5

Predict whether each of the following compounds is molecular or ionic. b. NaI

Predict whether each of the following compounds is molecular or ionic. d. Ca(NO₃)₂

Predict whether each of the following compounds is molecular or ionic. e. FeCl3