Show:
Chemistry History
Atomos
Atomic Nucleus
Periodic Table & Trends
Random Mix!
100
Triple Jeopardy: What is one concept from John Dalton's Atomic Theory that is no longer true today? Give an example.
-atoms are indivisible (Atomic Bomb) -all atoms of the same element are the same (Isotopes)
100
Which subatomic particle has an approximate mass of 0 amu?
Electrons
100
Name the three types of radiation:
alpha, beta, and gamma
100
What is the chemical family name for the Group 7 elements?
Halogens
100
What is the speed of light?
3.00 x 10^8 m/s
200
Who coined the word "atomos", meaning "not to be cut"?
Democritus
200
What element has 29 protons?
Copper
200
Which type of radiation is the most dangerous, and why?
Gamma, because it's pure energy
200
Which chemical family contains elements with 2 valence electrons?
Alkaline Earth metals
200
Name the 7 colors of the visible light spectrum from longest wavelength to shortest wavelength
ROYGBIV
300
Which scientist discovered electrons by passing electricity through a neutral gas tube?
JJ Thompson
300
How many neutrons does U-238 have?
146 neutrons
300
If U-240 undergoes alpha decay, what is the resulting element AND mass?
Th-236
300
Double Jeopardy: What element has 3 valence electrons and 3 energy levels?
Aluminum
300
What caused the emission of colored light when we burned metals in the Flame Test Lab?
The excited electrons returned to ground state by releasing energy
400
What did Neils Bohr discover concerning electrons?
Electrons exist on specific energy levels
400
What are the symbols for the elements Polonium and Phosphorus, in that order?
Po P. Hold it down!
400
How can you protect yourself from Gamma radiation?
You need 25-35 ft of lead and concrete
400
Rank these elements from smallest to largest atomic radius: Copper, Francium, and Hydrogen
Hydrogen, Copper, Francium
400
What did we learn from the Properties of Transition Metals lab?
- elements in the same area of the periodic table behave the same -transition metals produce more precipitates Answers may vary
500
Double Jeopardy: What are the two concepts Rutherford discovered from his Gold Foil experiment?
-The atom is mostly empty space -The nucleus is dense -The nucleus is positively charged
500
Triple Jeopardy: Calculate the average atomic mass of Li-7 (90% abundance) and Li-6 (10% abundance). INCLUDE THE UNIT!
6.9 amu
500
Double Jeopardy: Why is fission easier to complete than fusion?
Fusion requires massive energy to force two nuclei to join into one.
500
Triple Jeopardy: Why does atomic radius DECREASE as you travel UP the periodic table?
You have fewer and fewer energy levels, so less electron repulsion.
500
Triple Jeopardy: The noble gases are often called "inert gases" because they're unreactive. Why are they unreactive?
They have 8 valence electrons, a completely filled valence shell.