Chemistry - Determining chemical formulas

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (Use the periodic table as necessary.) GroupMost Likely Ionic Charge# of Valence Electrons I+1 II+2 III+3 IV+4 or -4 V-3 VI-2 VII-1 VIII0 5

1 2 3 4 5 6 7 8

vBalance the following reaction. 2Ca 3 (PO 4 ) 2 + ___ C + 6SiO 2 → ___ CaSiO 3 + P 4 + ___ CO

10 6 10

Balance the following reaction. ___ As 2 S 3 + 9O 2 → 2As 2 O 3 + ___ SO 2

2 6

Match each vocabulary word with its definition. Match the items in the left column to the items in the right column. 1. cation 2. ion 3. anion 4. ion charge

2 = a charged particle 4 = the net charge an atomic particle carries 1 = a positively charged ion 3 = a negatively charged ion

Balance the following reaction. P 4 + ___ O 2 → 2P 2 O 5

5

Predict the chemical formula for a compound between Al and S.

Al 2 S 3

Predict the chemical formula for a compound between aluminum and chlorine.

AlCl 3

Predict the formula for Ba +2 and S -2 .

BaS

Predict the chemical formula for a compound between calcium and chlorine.

CaCl 2

If D +2 would react with E -1 , what do you predict to be the formula?

De 2

In the following table, all the columns for the element beryllium are filled out correctly. ElementElectron Structure of AtomElectron Structure of IonNet Ionic Charge beryllium1s 2 2s 21s 1+2

False

Write the chemical formula for the following compound: Iron (III) fluoride

FeF 3

Choose the correct name for the following compound: H 2 S

Hydrogen sulfide

Predict the chemical formula for a compound between lithium and oxygen.

Li 2 O

Choose the correct name for the following compound: NaCl.

Sodium chloride

Explain your reasoning for your formula prediction for Ba +2 and S -2 .

The total charge of cations plus anions must equal zero

Name the following compound: Cu 2 S

copper(I) sulfide

In the following table, all the columns for the element calcium are filled out correctly. ElementElectron Structure of AtomElectron Structure of IonNet Ionic Charge calcium1s 2 2s 2 2p 6 3s 2 3p 6 4s 21s 3 2s 2 2p 6 3s 2 3p 6 4s 1+1

false

Do the positive ions tend to be metals or nonmetals?

metals

Would the two as yet undiscovered elements A +1 and D +2 react?

no

Do the negative ions tend to be metals or nonmetals?

nonmetals

In the following table, all the columns for the element nitrogen are filled out correctly. ElementElectron Structure of AtomElectron Structure of IonNet Ionic Charge nitrogen1s 2 2s 2 2p 3 1s 2 2s 2 2p 6-3

true

In the following table, all the columns for the element oxygen are filled out correctly. ElementElectron Structure of AtomElectron Structure of IonNet Ionic Charge oxygen1s 2 2s 2 2p 41s 2 2s 2 2p 6-2

true