Essay about Periodic Table and Mass Atomic Mass

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MIDTERM REVIEW SHEET 2013

To prepare for your midterm: • Review all tests, quizzes, and labs • Look over review sheets and problem sets • Complete this review sheet

1. Know the following terms:

proton

electron

nucleus

neutron

atom

mass number

atomic mass

atomic mass unit

isotope

atomic number atomic orbital

ground state aufbau principle Pauli exclusion principle

electron configuration Heisenberg uncertainty principle

atomic emission spectrum photon

photon

frequency

quantum

wavelength

spectrum

electronegativity periodic law ionization energy atomic mass

atomic radius

period metal

group

transition metal cation anion

structural formula diatomic molecule valence electrons

2. What do the following prefixes mean: mega, kilo, deci, centi, milli, micro, nano, pico

mega (M) = 106, kilo (k) = 103, deci (d) = 10-‐1, centi (c) = 10-‐2, milli (m) = 10-‐3, micro (μ) = 10-‐6,

nano (n) = 10-‐9, pico (p) = 10-‐12 3. Describe the difference between accuracy and precision.

Accuracy is getting the desired result (For example: getting a 100 on the midterm)

Precision is getting the same result every time (For example: getting a 75 on every test) 4. What is the difference between an extensive and an intensive property?

Extensive property changes based on the amount of substance (mass, volume)

Intensive properties are independent of amount (color, texture, density) 4. State the number of significant digits in

a. 0.00451

b. 1.00451

c. 4.50

d. 450 3

6

3

2 5. Complete the following calculations and report the answer to the correct number of significant figures.

a. 4.067 + 2.2

b. 12.65 / 4.52 c. 101.3 x 2.44

6.3

2.80

247 6. Convert the following to scientific notation a. 120,000

b. 0.000495

c. 259 1.2 x 105

4.95 x 10-‐4

2.59 x 102 7. A brick used in the construction of pottery kilns is 11.0 cm wide, 6.0 cm tall, and 22.7 cm long. The brick has a mass of 2950 g. What is the

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