Class notes
Chemistry review assessment
- Course
- Institution
Written with Virtual high school (VHS)
[Show more]
Seller
Follow
studystar9touni
Content preview
1) Carbon 14 is an isotope of carbon element with an atomic mass of 14. The atomic number ofcarbon is 6, protons and electrons always equal the same number as atomic number so protons
and electrons are 6. The formula used to calculate the number of neutrons can be derived from
the formula Mass = number of protons + neutrons; the new formula will be neutrons = mass -
number of protons. 14 - 6 = 8.
2) Lithium. b) Isotopes
3) Sodium has one valence electron and chlorine has 7, chlorine needs one more electron to
complete its orbit and become stable which sodium can provide. When chlorine gains one
electron from sodium, sodium will gain a positive (+1) charge and chlorine will gain a negative
(-1) charge. Opposite charges attract therefore these elements will bond and create sodium
chloride.
4) A covalent bond is the sharing of electrons between two nonmetals to complete their orbit.
The first difference is that in a covalent bond, electrons are being shared while in an ionic bond
electrons are being transferred. The second difference is that in a covalent bond, non metals share
electrons between both elements, in an ionic bond a nonmetal and metal transfer electrons to the
other element. The third difference is that after the transfer of electrons in an ionic, the elements
gain charges; charges in a covalent bond do not take place.
5) Electronegativity
6) Polar covalent bond.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller studystar9touni. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $2.20. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73918 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now