100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
chem study guide part 2 $17.59
Add to cart

Class notes

chem study guide part 2

 1 view  0 purchase

Lecture notes of 2 pages for the course CHEM 223 at Hunter College - Cuny (Guide for exam)

Preview 1 out of 2  pages

  • August 20, 2024
  • 2
  • 2023/2024
  • Class notes
  • Martina kucerova levisohn
  • All classes
All documents for this subject (11)
avatar-seller
milagrosmejia
Democritus: ancient Greek thinker believed that matter could be divided into smaller and
smaller particles until a basic particle was reached. He was the first to suggest the existence of
atoms

Atoms: the smallest particle of an element that retains both the chemical and physical properties
of that element

John Dalton: performed experiments to arrive at his Atomic Theory

John Dalton's Atomic theory:

1. All matter is composed of extremely small particles called atoms
2. Atoms of the same element are identical. Atoms of different elements are different
3. Atoms cannot be subdivided, created, or destroyed.
4. Atoms of different elements can combine in simple, whole-number ratios to form compounds
5. in chemical reactions, atoms are combined, separated or rearranged

Law of multiple proportions

Atoms of different elements can combine in simple, whole-number ratios to form compounds



1. Why isn't all of Dalton's theory true? Atoms can be broken down and atoms of the same
element are not identical because isotopes of that element exist
2. Atoms are made up of: protons, neutrons, and electrons
3. actual mass of protons and neutrons 1.67x10^-24 grams
4. Chemists use _______ comparisons of the masses of atoms relative
5. the unit of comparison is the atomic mass unit (amu)
6. Atomic mass unit: defined as 1/12 the mass of a carbon atom that contains six protons
and six neutrons
7. For all practical purposes the mass of a single proton or neutron is 1 amu
8. symbol of electron e-
9. relative electrical charge of electron 1-
10. Approximate relative mass (amu) of electron 1/1840
11. Actual mass of electron 9.11x10^-28
12. symbol of proton p+
13. Relative electricalcharge of proton 1+
14. Approximate relative mass of proton 1
15. actual mass of proton 1.67x10^-24 grams
16. symbol for neutron n^0
17. relative electrical charge for neutron 0
18. approximate relative mass for neutron 1
19. actual mass 1.67x10^-24 grams
20. John Dalton's model of the atom atom was invisible and the smallest particle that
could exist

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 milagrosmejia. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $17.59. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

52510 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$17.59
  • (0)
Add to cart
Added