CHEMISTRY MIDTERM REVIEW PART 1

1) What are the 3 states of matter and how do the particles in the 3 states of matter compare? (use the following in your explanation: definite/indefinite shape, definite/indefinite volume, molecules strongly, weakly, or not attracted to each other, draw pictures)

2) Define the following:

a. Melting point

b. Boiling point

c. Freezing point

3) Identify the following as a chemical or physical change:

a. Boiling e. Freezing

b. Melting f. Condensing

c. Rusting g. Breaking

d. Rotting h. fermenting

4) What is a homogeneous mixture? What is another name for a homogeneous mixture? Give 2 examples of a homogeneous mixture.

5) What is a heterogeneous mixture? Give 2 examples of a heterogeneous mixture.

6) What are the charges and masses (in amu) of the following:

a. Neutron

b. Proton

c. Electron

7) What is an isotope?

8) Define atomic mass unit.

9) What are the 2 techniques to separate homogeneous mixtures? Describe those techniques and the physical processes used in the separation (in other words explains what happens physically.)

10) What is the technique used to separate heterogeneous mixtures? Describe the technique and how you would use it to separate the mixture?

CHEMISTRY MIDTERM REVIEW PART 2

11) Complete the following table

Name / Symbol / Atomic Number / Number of Protons / Number of Neutrons / Mass Number / Number of Electrons
Gold / 199
56 / 45
74 / 111

12) Draw the entire Aufbau (energy diagram) chart from 1s to 5p

13-18) For the following atoms: 1) draw the Bohr model (13-16 only), 2) write the e-configuration, 3) draw the aufbau diagram:

13) Calcium

14) Oxygen

15) Aluminum

16) Fluorine

17) Copper

18) Strontium

19) For the following figure:

a.  LABEL: neutrons, protons, electrons, nucleus, + charge, - charge

b.  How many electrons does this atom have?

c.  How many protons does this atom have?

d.  How many neutrons does this atom have?

e.  What is its mass #?

f.  What element is this? How do you know? What value(s) did you use?

g.  Is this particular atom the most common isotope of this element?

How do you know?

CHEMISTRY MIDTERM REVIEW PART 3

20) List all components of Dalton’s atomic theory. Draw labeled pictures where applicable.

21) Rutherford’s solar system atomic model

a. Draw labeled picture, including charges of model

b. Describe model (nucleus, location of electrons)

c. How electrons are arranged

d. Why model was not 100% correct

22) THOMSON’S experiment

a) Labeled diagram of the experiment (small diagram ok)

b) What did he discover in the experiment?

c) What evidence did he have to support his discovery/theory?

23) RUTHERFORD’S experiment

a) Labeled diagram of the experiment (small diagram ok) KNOW THIS

b) What did he discover in the experiment?

c) What evidence did he have to support his discovery/theory?

24) Bohr atomic model

a. Draw labeled picture, including charges of model

b. Describe model (nucleus, location of electrons)

c. How electrons are arranged

d. Why model was not 100% correct

25) Quantum mechanical atomic model

a. Draw pictures of s and p orbitals (x, y, and z axis)

b. Describe/define electron cloud

c. Where are electrons