Chemistry

NOS & Matter

100

Which step of the scientific method is missing:

1.Ask a question
2. ?????????????????????
3. Design Experiment
4. Collect Data
5. Analyze Data
6. ?????????????????????
7. Communicate Results

2. Make Hypothesis

6. Form Conclusions

200

Give an example of a chemical change.

Rust, Burning, Explosion (any type of reaction)

300

Which is an EXTENSIVE property?

a. Color is blue
b. Density is 2g/mL
c. Mass is 5g
d. Condutive

c. Mass is 5g

(Extensive = changes with amount

Intensive = stays the same no matter how much)

400

Which particle diagram shows a mixture? 

B. 

500

Biochemistry is the study of________________. 

the chemical processes in living things

Atoms & Nuclear

100

What does atomic number tell you?

Number of protons (and electrons if neutral atom)

200

Which particle has the weakest penetrating power?

a. Beta
b. Gamma
c. Positron
d. Alpha

D. Alpha

300

What is the difference between Nitrogen-14 and Nitrogen-15?

Different mass, different isotope, and different number of neutrons

400

Name one atomic structure experiment and what discovery was made.

Gold Foil Experiment = Nucleus

Cathode Ray Experiment = Electrons & Protons

500

List 5 models of the atom.

Billiard Ball (Dalton), Plum Pudding (JJ Thompson), Rutherford Model, Bohr Model, Quantum/Electron Cloud Model

Electrons & Periodic Table

100

What charge and mass does an electron have?

Negative charge, negligible mass

200

How many valence electrons does chlorine have?

7

300

Which atom is larger? (use a periodic table)

O vs. S

Sulfur

400

Why does atomic radius decrease across the periodic table?

Nuclear Charge (more protons in the nucleus)

500

What is the short hand electron configuration of silver? (Use a periodic table)

[Kr]5s²4d¹⁰

Ionic & Covalent

100

What types of elements are in Ionic compounds?

Metal & Nonmetal (Opposite charges)

200

What is the name of the following compound:

C₂Cl₄

Dicarbon tetrachloride

300

What is the shape of the following compound:

Tetrahedral

400

What is the formula for Magnesium Hydroxide?

Mg(OH)₂

500

What is the criss-cross method and how do you use it? 

Determine the ions of each element in the compound, then criss-cross the charges and make them subscripts in the compound.

Reactions

100

What type of reaction is this:

2Na + Cl₂ >> 2NaCl

Synthesis

200

How would you balance the following equation:

___BaCl₂ + ___NaBr >> ___CaCl₂ + ___BaBr₂

___BaCl₂ + __2_NaBr >> ___CaCl₂ + ___BaBr₂

300

How could you write this equation in words:

CaCO₃ + 2HCl >> CaCl₂ + CO₂ + H₂O

Calcium carbonate plus hydrogen chloride yields calcium chloride, carbon dioxide, and water.

400

When will double replacement be no reaction?

If all products are (aq) soluble

500

Is AgCl soluble or insoluble in water?

Insolube