Chemistry Unit 2 Review

Quantum Mechanics and Atomic Models

100

What is the charge of electrons?  

-1 eV
(negative)

200

Where are protons located within an atom?

nucleus

300

How does the mass of electrons compare to the mass of the nucleus?

not significant

400

How many electrons are in the third energy level?

8

500

What is the mass of an electron? 

9.11 * 10^-28 g
(not on the test)

Atomic Structure and Subatomic Particles

100

In which model are electrons arranged in fixed energy levels around the nucleus?

Bohr Model

200

How many electrons in the s orbital?

2

300

What does the Heisenberg Uncertainty Principle state?

can't know both position and velocity (direction) or a particle.

400

What is the electron configuration for silicon?

1s²2s²2p⁶3s²3p²

500

Calculate the possible quantum numbers (n, l, m, ms) for an electron in a 3p orbital.

3, 1/p, -1/0/+1, +1/2,-1/2

Chemical Properties and Periodic Table

100

What is the periodic table organized by?

# of protons

200

How many valence electrons does an element in Group 16 have?

6

300

Define atomic radius and how it varies across the periodic table.

The size of an atom. Increases down and to the left.

400

Define electronegativity and how it changes across the periodic table.

It is how much an atom attracts electrons when in a covalent bond. Increases to the right and up.

500

Define ionization energy and how it varies across the periodic table.

How much energy it takes to remove an electron from a neutral atom. Increases to the right and up.

Chemical Classification

100

Name one group found on the periodic table.

Could be: alkali metals, alkaline earth metals, halogens, or noble gasses. (transition metals is not a group, cause a group is one column.)

200

What is the name for group number 1 (besides hydrogen).

alkali metals

300

What is the name for group #2?

Alkaline Earth Metals

400

What is the name for all the elements in the d block?

transition metals

500

Name all the metalloids.

You don't have to know this for the test, but it is good to know: 

1. Boron (B)
2. Silicon (Si)
3. Germanium (Ge)
4. Arsenic (As)
5. Antimony (Sb)
6. Tellurium (Te)
7. Polonium (Po)

Observational Concepts

100

What is a period?

horizontal row on periodic table

200

Are electrons attracted to the negative or positive side of a magnet?

negative

300

What is a Coulomb a measure of?

charge

400

Draw orbital filling diagram for fluorine.

(can't insert pictures), google it lol

500

Explain how Rutherford's Gold Foil Experiment demonstrated the presence of a nucleus.

Reflected back alpha particles, but most alpha particles went straight through, showing that there is a dense mass in the middle of the atom.