Chapter 7

Question 0

Which is described as the force holding two atoms together?

Answer 0

Chemical bond.

Question 1

Which is the correct formula for the ionic compound that results from these two atoms ?
X ( two dots ) Y ( five dots )

Answer 1

X 3 Y 2

Question 2

Which is the charge that results when oxygen becomes an ion?

Answer 2

O -2

Question 3

Group 13 elements tend to acquire which charge when they form ions?

Answer 3

+3

Question 4

Which is the correct formula for the compound formed between beryllium and Nitrogen?

Answer 4

Be3N2

Question 5

Which is the correct formula for the compound Manganese (III) Fluoride

Answer 5

MnF3

Question 6

Which is the correct formula for the compound Chromium (II) Nitrate ?

Answer 6

Cr(NO3)2

Question 7

Which is the correct name for the compound Na3P?

Answer 7

Sodium Phosphide.

Question 8

T/F

A cation is a negatively charged atom.

Answer 8

False.

Question 9

T/F

In an ionic bond , two cations can bond together to form a compound.

Answer 9

False.

Question 10

T/F

When an atom gains electrons , it becomes positively charged.

Answer 10

False.

Question 11

T/F

Phosphide is the name of the anion formed when phosphorus gains three electrons.

Answer 11

True.

Question 12

T/F

Lithide is the name of the cation formed when lithium loses an electron.

Answer 12

False.

Question 13

T/F

Metallic elements tend to form cations rather than anions.

Answer 13

True.

Question 14

T/F

An ionic bond is an electrostatic force that holds together oppositely charged atoms in a compound.

Answer 14

True.

Question 15

T/F
A crystal lattice is a three - dimensional structure formed by positive ions surrounded by negative ions and negative ions surrounded by positive ions.

Answer 15

True.

Question 16

T/F

A chemical bond result from the interaction between two nuclei

Answer 16

False.

Question 17

T/F
The elements, neons, with the electron configuration 1s2 2s2 2p6, will not form a chemical bond with another element, oxygen

Answer 17

True.

Question 18

T/F

A sodium ion is more stable than a sodium atom.

Answer 18

True.

Question 19

Magnesium ribbon.

List all the equipment you used and summarize procedure

Answer 19

Equipment : busen burner , clay triangle bowl , magnesium ribbon , and balance.
Procedure : matching the flame first than turned the gas on to create the fire. We than put the Bowl over the clay triangle filled with the magnesium ribbon directly onto the fire causing a white light
Warning : not to touch the clay bowl .

Question 20

Magnesium ribbon.
Describe what you saw. What was the product formed ? ( give formula and name) . What was happening in the atomic level ( which element was gaining and which was losing)

Answer 20

As the magnesium was burning it became a grayish ash substance. The product formed was MgO , which is Magnesium Oxide . On the atomic level Magnesium was losing two and oxygen was gaining two.

Question 21

Formula of Beryllium Nitride

Answer 21

Be3N2

Question 22

Formula of Chromium (I) Carbonate

Answer 22

Cr2(CO3)

Question 23

Formula of Magnesium Phosphate

Answer 23

Mg3(PO4)2

Question 24

Formula Calcium Chlorate

Answer 24

Ca(CIO3)2

Question 25

Formula of Aluminum Bromide

Answer 25

AlBr3

Question 26

Name of Na2So4

Answer 26

Sodium Sulfate

Question 27

Name of BaF2

Answer 27

Barium Flouride

Question 28

Name of CsBr

Answer 28

Cesium Bromide

Question 29

Name of Fe2O3 (Fe has more than one oxidation number )

Answer 29

Iron (III) Oxide

Question 30

Name of (NH4)2S

Answer 30

Ammonium Sulfide