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2.11 Chemical Formulas and Names

Last updated over 3 years ago

15 questions

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Question 15

15.

What patterns do you notice about the charges of ions based on their position and Group number on the periodic table? SELECT ALL THAT APPLY

All elements in the same group have the same charge (ion).

The charge for cations is the same as the number of valence electrons the metal loses 

The charge for cations is the same as  the number of valence electrons the metal gains

The charge for anions is the same as the number of valence electrons the nonmetal loses

The charge for anions is the same as the number of valence electrons the nonmetal gains

Question 1

1.

Use the periodic table above to list the name of each element found in the three compounds shown in the Model 1.

Question 2

2.

How does the name of the elements in each compound from Model 1on the first page differ from that of the element names?

They are the same

The cation name (metal, + ion) is the same while the anion name (nonmetal, - ion) has an -ide ending

The cation name (metal, + ion) has an -ide ending while the anion name (nonmetal, - ion) is the same

Question 3

3.

There are ________ sodium ions shown in the 1st sample above and _chloride ions.

There is a _____ ratio between the two ions.

8, 8, 1:1

9, 9, 1:1

8, 16, 1:2

9, 18, 1:2

Question 4

4.

There are ________ calcium ions shown in the 2nd sample above and _chloride ions.

There is a _____ ratio between the two ions.

5, 5, 1:1

10, 10, 1:1

5, 10, 1:2

10, 5, 2:1

Question 5

5.

There are ________ aluminum ions in the 1st 3rd sample above and _oxide ions.

There is a _____ ratio between the two ions.

4, 4, 1:1

4, 8, 1:2

4, 6, 2:3

6, 4, 3:2

Question 6

6.

What is the relationship between the chemical formula for the three compounds in Model 1 and the ratio of ions (Cations: Anions) in them?

The ratio of ions is greater than the subscripts in the chemical formula.

The ratio of ions is less than the subscripts in the chemical formula

The ratio of ions is the same as the subscripts in the chemical formula

Question 7

7.

The charge of the sodium ion is _ and the chloride ion is __.

+1, -1

+2, -1

+2, -2

+3, -2

Question 8

8.

The charge of calcium ion is _ and chloride ion is __.

+1, -1

 +1, -2

+2, -1

+2, -2

Question 9

9.

The charge of aluminum ion is _ and oxide ion is __.

+2, -2

 +2, -3

+3, -2

+3, -3

Question 10

10.

All samples of sodium chloride have a ratio of one sodium ion for one chloride ion. What must be true of the total (net charge) for any sample of sodium chloride?

When you add up the charges for all the positive and negative ions you get a net (total) charge of +9. 

When you add up the charges for all the positive and negative ions you get a net (total) charge of -9.

When you add up the charges for all the positive and negative ions you get a net (total) charge of zero.

Question 11

11.

All samples of calcium chloride have a ratio of one calcium ion for two chloride ions. What must be true of the total (net charge) for any sample of calcium chloride?

When you add up the charges for all the positive and negative ions you get a net (total) charge of +10. 

When you add up the charges for all the positive and negative ions you get a net (total) charge of -10.

When you add up the charges for all the positive and negative ions you get a net (total) charge of zero.

Question 12

12.

All samples of aluminum oxide have a ratio of two aluminum ions for three oxide ions. What must be true of the total (net charge) for any sample of aluminum oxide?

When you add up the charges for all the positive and negative ions you get a net (total) charge of +12. 

When you add up the charges for all the positive and negative ions you get a net (total) charge of -12.

When you add up the charges for all the positive and negative ions you get a net (total) charge of zero.

Question 13

13.

From the pattern seen in the last three questions, what is the rule for the total charge of a compound?

It is the same as the ratio of ions. 

It is the same as the subscripts in the chemical formula

it is always equal to a net charge of zero. 

Question 14

14.

The chemical name for the image above is _ and the chemical formula is __.

Barium Iodide, BaI2

Barium Iodine, BaI2

Barium Iodide, Ba2I

Barium Iodine, Ba2I