EXAM 1 (Chapter 1-3)

Question 1

Heterogeneous VS Homogeneous Mixtures:

Answer 1

Hetero- distinct layers, NOT uniform throughout the mix.

Homo- Uniform throughout the entire mixture.

Question 2

What is a compound?

Answer 2

Mix of 2 or more elements!

Question 3

What are Ions? How are they different from elements?

Answer 3

Ions are charged elements. They could have either cations or anions

Question 4

What are Isotopes?

Answer 4

Variations of the exact same element, with different mass numbers(proton + neutron)

Question 5

Remember Avogadro’s number, how to set it up!!

Answer 5

yes.

Question 6

Ionic Bonds VS Covalent Bonds:

Answer 6

Ionic: Between metal and nonmetal. One of strongest bonds! Metals tend to give/lose e- to nonmetals.
Covalent: Between nonmetals, sharing e- together.

Question 7

DEFINITELY LOOK AT NAMING!

Answer 7

Week 2, CH.3

Question 8

What is Formula Mass?

Answer 8

Molar Mass on the periodic table.

Question 9

Empirical Formula VS Molecular Formula:

Answer 9

Empirical: The lowest ratio of elements in formula.
Molecular: the TRUE ratio of elements in a compound. always a multiple of the E.F!!!