Question

Elements in the third period make compounds with oxygen as follows:
What are the compounds for Mg and P

MgO2 and P2O3
MgO and PO3
Mg2O and PO2
MgO and P2O5
MgO2 and P2O5
Mg2O2 and PO3

Answer 1

\[2Mg + O_{2} \rightarrow 2MgO\] Magnesium Oxide

Answer 2

thats not what i need but thank you for trying

Answer 3

Are you looking for which choice combination is correct?

Answer 4

yes

Answer 5

Based off of what is given, I'd say right now you have either choice 1 or 5. I'm thinking about P & O right now...

Answer 6

1 and 5 are actually incorrect, the homework program i am using says so :(

Answer 7

Really? I'll hit the books again...

Answer 8

thank you so much!

Answer 9

You know what, I looked at my answer in the incorrect way. I believe it could be eliminated down to either choices 2 or 4 because my "dyslexia" kicked in. The 2 in front of the products implies that there are two molecules needed. I made a mistake in placing it with the oxygen. Still thinking about the P & O though...

Answer 10

haha no problem

Answer 11

After further thought I believe choice 4 is the correct answer. If we look at the lewis structure of oxygen and phosphorus, we see that oxygen has 6 available electrons per atom and the phosphorus only 5 available electrons. By drawing an ugly picture we can see that each phosphorous electron pair can complete the octet for 2 oxygens per phosphorus and still have one electron left over for each phosphorus. These 2 remaining electrons would then go to a 5th oxygen atom and provide a perfect octet of electrons for the last oxygen atom and there would then be no extra electrons left. (Drawing ugly picture now...)

Answer 12

we haven't covered lewis structures yet but ok

Answer 13

It wants to obey the octet rule. This means that no electrons are left out if possible. If there is a vacant place to go they will fill it. Check out the ugly drawing. Maybe it will make sense. The file is a PDF. Let me know how that works for you.

Answer 14

And again, when I mean octet rule, I mean that each atom only has 8 electrons that It can have in its outer shell.

Answer 15

haha that's pretty good

Answer 16

my teacher told us about how Li and Cl combine: LiCl and how Be and Cl combine: BeCl2 but once i get to the period that P is in i get confused

Answer 17

Do you know how to identify if the element has a positive or negative charge associated with it? That helps a lot and I can explain briefly if needed.

Answer 18

yes it comes from the periodic table right?

Answer 19

Yep. Your first group under hydrogen/lithium has a charge of +1. The berellyum (Be) group has a charge of +2, the Boron group +3, and Carbon +4. Going in the other direction, the Halogens (Fluorine, Chlorine, etc...) have a charge of -1, Oxygen group (-2), Nitrogen group (-3). Lets consider the reaction between aluminum and chlorine. Aluminum has a +3 Charge and chlorine a -1 Charge. I'll post the equation below and talk further about this.

Answer 20

Actually, lets consider Aluminum and Oxygen (-2). One sec...

Answer 21

\[Al ^{+3} + O ^{-2} \rightarrow Al _{2}O _{3}\]

Answer 22

so they just switch?

Answer 23

This is an ionic type equation because we are only looking at how they combine. What you do is take...

Answer 24

Yep, they switch.

Answer 25

Make the "exponent" the subscript of the combining atom.

Answer 26

Or element I should say.

Answer 27

This is the basis for making chemical equations but a few more things really need to be done to balance them but you're right for what you're being taught now... They just switch.

Answer 28

so what happens when you have 2 negative charges that are not the same?

Answer 29

Example?

Answer 30

N and O

Answer 31

i can only choose one answer

Answer 32

keep in mind only one of each element is being combined into a compound

Answer 33

Same Idea as with the phosphorous. Both nitrogen and phosphorous have 5 electrons and 3 spaces to be filled. Oxygen has 6 electrons and 2 spaces to be filled, again according to the octet rule. When you are combining negative charged elements, we are dealing with covalent bonding. So to have all of the electrons filled, you would have to draw a lewis structure like I did earlier and you would find that the end result would be N205

Answer 34

it was the fourth answer!!! :D thank you so much!!!!!!

Answer 35

No problem. Thanks for the props... Metallic bonding takes place between the metals and non metals on the periodic table. This is when you can just switch things. Covalent bonding is a little more tricky. Good luck and thanks again!

Answer 36

no, thank you! i am sure i will have more questions for u in the future. r u a chemistry teacher?

Answer 37

I'm actually a HS Physics & Math teacher working on my Chem certification. By all means look me up. I need the extra practice.

Answer 38

Cool! I'm sure you will be a great Chemistry teacher as well!

Answer 39

Thanks for the kind words. Take school seriously. The benefit may not be seen now but the reward is yours to be had in the future. I'm off to bed. Good luck!

Answer 40

I will! Thank you so much!