Ask your own question, for FREE!
Chemistry 56 Online
OpenStudy (anonymous):

Which of these substances are elements? more than 1 answer 1.silicon 2.lead 3.silicone 4.water 5.iodine 6.quartz

OpenStudy (anonymous):

hi @stephstar101 :D

OpenStudy (anonymous):

it's like no one in this chemistry section wow... :(

OpenStudy (stephstar101):

1, 2, and 5 are elements; the others are compounds (silicone is synthetic, but water and quartz are natural) :D Hey there @Ala123!

OpenStudy (anonymous):

i thought water was element :(

OpenStudy (anonymous):

and how can you tell the differences between elements and compound ?

OpenStudy (stephstar101):

Nope, it's covalently bonded! H2O is the molecule. Elements are purely one "element" while compounds/molecules are made up of elements.

OpenStudy (anonymous):

ohh ok !

OpenStudy (anonymous):

thanks alot !

OpenStudy (anonymous):

i have some other questions as well if you don't mind answering them here ?

OpenStudy (anonymous):

is brass a heterogeneous ?

OpenStudy (stephstar101):

I believe brass is a homogeneous mixture. You can't tell apart the tin and the copper.

OpenStudy (anonymous):

oh i see, what about oil and water, that should be hetero right ?

OpenStudy (anonymous):

Water and oil are not elements, but they are made from elements. They are combinatins of elements. Water is H2O. So, 2 Hydrogen atoms and 1 oxygen atom.

OpenStudy (anonymous):

1,2 and 5 are elements. That's it.

OpenStudy (anonymous):

yeah what about oil and water? is it heterogeneous ?

OpenStudy (anonymous):

Heterogenoeous what? Mixture?

OpenStudy (anonymous):

yeah

OpenStudy (anonymous):

Remember, heterogeneous means that you can see different parst. Example: Crunchy peanut butter. You can see the peanuts, while oil and water are homogeneous because you can't see different parts to it. It looks like one, even though has more than one thing in it. Make sense?

OpenStudy (anonymous):

@Ala123 Do you understand?

OpenStudy (anonymous):

yes in understand thanks!

OpenStudy (anonymous):

Yes, no problem.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!