General Info for CHEM 101

Question 1

Aufbau Principle

Answer 1

Energy levels fill from lowest to highest; core electrons shield valence by repelling

Question 2

Pauli Exclusion

Answer 2

No two electrons can have some four numbers; no orbital has more than two electrons

Question 3

Hydrogen Charge

Answer 3

1+

Question 4

Be Charge

Answer 4

2+

Question 5

Boron Charge

Answer 5

3+

Question 6

Carbon Charge

Answer 6

4+

Question 7

Nitrogen Charge

Answer 7

3-

Question 8

Oxygen Charge

Answer 8

2-

Question 9

Fluorine Charge

Answer 9

1-

Question 10

Metalloids

Answer 10

Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium (BSGAAT)

Question 11

Ionization Trend

Answer 11

Decreases down a column, increases left to right (Intuitive one) (He has highest)

Question 12

Molecular formula

Answer 12

Actual number of atoms in each element*

Question 13

Empirical Formula

Answer 13

Relative number of atoms (divide by GCF)*

Question 14

Atomic Radius Trend

Answer 14

Decreases left to right, increases down group
(as electronegativity increases, radius decreases)

Question 15

Electronegativity

Answer 15

Increases left to right, decreases down group
(inverse of radius)

Question 16

Effective Nuclear Charge

Answer 16

Proton# - Core electrons

Question 17

Diamagnetic

Answer 17

All paired electrons

Question 18

Paramagnetic

Answer 18

One unpaired electrons (para is spanish for for so idk remember it that way)

Question 19

Electron Affinity

Answer 19

Atom’s “want” and likelihood to gain electron
Decreases down a column
Increases across a period