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Chapter 6
Chapter 7
? RANDOM ?
Math o_O
Famous Chemists
100
~~~DOUBLE POINTS!!!~~~ What group of elements is located in Group 8A? (do not use periodic table for this)
Noble Gases
100
How many valence electrons does carbon (C) have?
4
100
Chemistry is the study of _______.
Matter
100
How many NEUTRONS does a potassium (K) atom have? (Round the atomic mass of potassium to the nearest whole number)
Atomic number: 19 Atomic mass: 39 (rounded) 39 - 19 __ = 20 neutrons
100
Which famous scientist created his own model of the atom and compared it to a ladder with messed up rungs?
Bohr
200
Which scientist arranged their periodic table by atomic mass? (not atomic number)
Mendeleev
200
Draw the electron dot structure of lithium (Li) on the board.
. Li *The symbol for lithium should have 1 dot.
200
What is the atomic mass of argon (Ar)? ROUND TO THE NEAREST WHOLE NUMBER.
40
200
Calculate the maximum number of electrons in the 6th principal energy level? Use the formula: 2n^2
2n^2 2(6)^2 2(36) = 72 electrons
200
Which famous scientist developed a classification system for the elements involving triads?
Dobereiner
300
Tell me the 3 classes of elements.
Metals Non-Metals Metalloids
300
Draw the electron dot structure of nitrogen (N) on the board.
.. . N . . *The symbol for nitrogen should have 5 dots.
300
A positively charged ion is called a what?
Cation
300
Use dimensional analysis to solve the following 2-step problem: How many seconds are in a workday that lasts exactly 8 hours? (put your answer into SCIENTIFIC NOTATION) KNOWN: 8 hours 1 hour/60 mins 1 min/60 sec UNKNOWN: sec?
8 hours x 60 mins = 480 mins 480 mins x 60 sec = 28,000 sec = 2.8 x 10^4
300
Which famous scientist (from the B.C. times) reasoned that atoms were indivisible and indestructible.
Democritus
400
What group of elements is located in Group 2A? (do not use periodic table for this)
Alkali earth metals
400
What is the difference between cations and anions?
Cations are positively charged ions. Anions are negatively charged ions.
400
What are the elements located in Groups 1A through 7A called?
Representative Elements
400
Multiply the following scientific notations: (3 x 10^4) x (2 x 10^2)
(3 x 2) = 6 (10^4 + 10^2) = 10^6 = 6 x 10^6
400
Which famous scientist performed his cathode ray experiment and discovered electrons?
Thomson
500
Which of the following elements has a LARGER ATOMIC SIZE? (do you remember the trend?) Elements: chlorine (Cl) and iodine (I) Use the periodic table.
Iodine (I)
500
~~~TRIPLE POINTS!!!!!!~~~ Draw the electron dot structure of helium (He) on the board.
. He . *The symbol for helium should have 2 dots (not 8!).
500
Clearly explain the difference between vapor and gas?
Vapor is not a gas at room temperature, it is either a solid or liquid normally. A gas is a gas at room temperature.
500
Calculate the wavelength of the yellow light emitted by a sodium lamp if the frequency of the radiation is 5.09 x 10^14 /s. Formula: c = λv c = 2.998 x 10^8 m/s MAKE SURE YOU ROUND YOUR ANSWER TO THE LEAST SIGNIFICANT FIGURE. If you move the decimal left, you add 1. If you move the decimal right, you subtract 1.
5.89 x 10^-7 m
500
Which famous scientist performed the gold-foil experiment to discover that atoms are mostly empty space?
Rutherford