College - Prep Final Exam Review

Matter and Change

100

Which is one way a chemical property can be identified?

Change in

- Color

- Production of an odor.

- Change of Temperature.

- Evolution of a gas (formation of bubbles)

- Precipitate (formation of a solid)

200

A student passes a magnet over 10 grams of powder. Four grams of the powder stick to the magnet, while 6 grams do not. Which of these identifies the substance?

mixture

300

If the size of an object decreases, its density does what?

not change

400

Substances with a definite volume but not a definite shape are in the _______ phase.

Gas

500

What are the two main parts of a solution?

Solute and Solvent

Sig Figs & Sci. Not.

100

How many sig. figs., are in the following number: 0.0045?

2

200

34.683 + 58.930 + 68.35112

161.964

300

How many significant figures in 1.40 x 10^3?

3

400

 98.1 x 0.03

3

500

(3 x 10^4) x (2 x 10^3) =

6x10^7

Atomic Structure

100

What are the three subatomic particles?

Neutrons, protons, and electrons

200

How many neutrons are in Barium? 

137-56=81 n^o

300

Who developed the Plum Pudding Model? 

Thomson

400

Who determined electron movement through maths?

Schrödinger

500

What is the difference between an isotope and an ion? 

Isotopes are atoms that have the same number of protons but different numbers of neutrons. An ion is an atom or molecule with a positive or negative charge.

Electrons in Atoms

100

The transition metals are in what electron configuration block?

d 

200

What is the Noble Gas electron configuration for Nitrogen?

[He] 2s2 2p3

300

How many valence electrons are in silver?

1

400

How many valence electrons are in: 1s2 2s2 2p6 3s2 3p3

5

500

Determine the number of electrons in each orbital for Gallium?

First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 3

Periodic Table & Periodicity

100

What is the most electronegative element? 

Fluroine

200

Metalloids have chemical properties similar to _____ and physical properties similar to ____

1. nonmetals

2. metals

300

What group on the periodic table is non-reactive?

Noble gases

400

Is Potassium not likely to form either negative or positive ions because its highest energy level already has a stable octet?

No, Potassium is in the first column and therefore has 1 electron in its outermost shell. It would tend to lose one electron and form a +1 ion.

500

Which of the following elements most readily gives up an electron?

A.      F

B.       Cl

C.       K

D.      Li

K