Finding Charges, electron configuration, and ionic formulae

Question 1

Chloride

Answer 1

Cl-

Question 2

Periodic table trends

Answer 2

All elements in the same group lose or gain the SAME NUMBER of electrons to achieve stability –> same charge.

Question 2

Naming rules

Answer 2

Non-metal ion is changed to “ide”, e.g. chloride
Metal ions are named “name of metal ion”, such as sodium ion, magnesium ion.

Question 3

Aluminum ion

Answer 3

Al 3-

Question 4

EC - O ion

Answer 4

1s2 2s2 2p6

Question 5

EC - Calcium ion

Answer 5

1s2 2s2 2p6 3s2 3p6 (lose 4s2)

Question 6

EC - Manganese ion (Mn2+)

Answer 6

1s2 2s2 2p6 3s2 3p5 (lose 4s2)

Question 7

Iron (lll) ion

Answer 7

1s2 2s2 2p6 3s2 3p6 3d5 (lose 4s2 and one 3d)

Question 8

Is ionic solid positive or negative charged

Answer 8

Ionic solid, also know as salts are neutral in charge.

Question 8

Sulfide ion

Answer 8

1s2 2s2 2p6 3s2 3p6

Question 9

Magnesium + iodine

Answer 9

MgI2

Question 10

Sodium oxide

Answer 10

Na2O

Question 10

Calcium oxide

Answer 10

CaO

Question 10

NO3-

Answer 10

Nitrate

Question 10

What is an example of positive ion

Answer 10

ammonium ion NH4+

Question 11

Sulfate ion

Answer 11

SO42-

Question 12

Nitrate

Answer 12

NO3-

Question 13

SO42-

Answer 13

Sulfate

Question 14

Ferric Nitride

Answer 14

FeN

Question 15

Ammonium Sulfate

Answer 15

(NH4)2 SO4

Question 16

Hydroxide

Answer 16

OH-

Question 17

OH-

Answer 17

Hydroxide

Question 18

Permanganate

Answer 18

MnO4-

Question 19

Hydrogen carbonate

Answer 19

HCO3-

Question 20

HCO3-

Answer 20

Hydrogen carbonate

Question 21

MnO4-

Answer 21

Permanganate

Question 22

Carbonate

Answer 22

CO32-

Question 23

Phosphate

Answer 23

PO43-

Question 24

Nitride

Answer 24

N3-

Question 25

Copper (ll) chloride

Answer 25

CuCl2

Question 26

Explain why potassium bromide is KBr and not K2Br

Answer 26

Potassium ion is K+, a cation, while Bromide is Br-, an anion. They both only have one charged ion released and needed to gain a full valence shell. Therefore, when they form an ionic compound, the charge is balanced.

Question 27

lead sulphate

Answer 27

PbSO4

Question 28

What holds the ions together in ionic compounds?

Answer 28

Electrostatic attraction.

Question 29

Sodium nitrate

Answer 29

NaNO3

Question 29

Calcium bicarbonate (hydrogen carbonate )

Answer 29

Ca(HCO3)2

Question 30

Ammonium sulphate

Answer 30

(NH4)2SO4

Question 31

Three common properties of ionic carbonate

Answer 31

1. high melting points 2. Does not conduct electricity well in solid form but does in molten form.