Unit 1 Flashcards Preview

Chemistry Exam > Unit 1 > Flashcards

Flashcards in Unit 1 Deck (15)
Loading flashcards...
1

The Location, Relative Mass, and Charge for: Electrons, Protons, and Neutrons

E: Outside Nucleus, negative, 0amu. P: Nucleus, positive, 1amu. N: Nucleus, neutral, 1amu.

2

How do you determine Average Atomic Mass?

Abundance Percent ÷ Isotope numbers + (repeat) ÷ 100 =

3

How do you determine what Isotope would be most abundant?

The number closest to the atomic mass of the element

4

How do you determine Half-life?

Take the original amount and split it in half. Repeat this with the new numbers until the amount of days given (i.e. 5 days) have been reached.

5

What requires energy and what gives off energy?

Requires: Making bonds. Gives off: Breaking bonds.

6

How do you know if a molecule is Polar?

It either has at least one lone pair or has more than one central element (does not include repeating surrounding elements).

7

List the Intermolecular Forces in increasing strength

1. Ion-Ion
2. Ion-Dipole
3. Hydrogen Bonding
4. Dipole-Dipole
5. London Dispersion

8

Why do Ionic solids have higher melting points than covalent solids?

Ionic solids are non-molecular

9

How is energy required to melt a substance, related to its Intermolecular forces?

Metallic: More energy required
Polar: Medium energy required
Non-Polar: Low energy required

10

What is the name of the binary compound AgCl?

Silver Chloride

11

What is the name of the binary compound MgS

Maganese Sulfide

12

What is the formula of the binary compound Dicarbon hexafluoride?

C2 F5

13

What is the formula of the binary compound Iron (II) nitrite?

IN3

14

How do you calculate empirical formula?

Grams ÷ Percentage =
Sum ÷ smallest overall sum =
whole number =
divide whole number by compound =
Empirical formula

15

How do you determine Molecular Formula?

My