Math
Determine the % composition of sodium bicarbonate (NaHCO3):
Na 27.367%
H 1.998%
C 14.289%
O 57.136%
What is the maximum rainfall per year for an area to be considered a desert?
250 mm or ~10 in.
How many element blocks are there?
4
S,F,D,P
What is ionization energy?
Energy required to remove an electron.
Which famous physicist invented a model of the atom?
Niels Bohr
Determine the empirical and molecular formula for the following: Caffeine, which contains 49.5% C, 5.15% H, 29.9% N, 16.5% O (by mass) and has a molecular mass of 195 u.
Empirical = C4H5N2O
Molecular = C8H10N4O2
What is Mr. Maxwell's favorite color?
Blue, no yellow, aaaaaaaaaahhhhhhhh
How do you write the electron configuration in shorthand?
Use the most recent noble gas as a stand-in for the core electrons, then list the outer shell.
What is electron affinity?
Energy that is released when adding an electron.
Who is the Russian?
Demitri Mendeleev
What is the electron configuration of potassium (K)?
1s2 2s2 2p6 3s2 3p6 4s1
Heads or tails?
Tails.
From left to right, do the elements get larger or smaller in diameter?
Smaller
What comes first in the quantum model of the atom, a donut or diagonal orbs?
Donuts first because they are for breakfast.
Who did the oil drop experiment?
Robert Millikin
1+1
2
What is the capital of Qatar?
Doha
From top to bottom, do the elements get larger or smaller in diameter?
Larger
Why does ionization energy increase dramatically after releasing the first electron in a Li atom?
The second electron is a core electron.
What kind of scientist was Robert Brown?
Write the electron configuration of a Nitrogen ion with a -3 charge.
1s2 2s2 2p6
Where does the electron live?
No one knows but probably near the nucleus.
Valence electron properties.
Explain why the electrons in a water molecule spend more time near the Oxygen than the Hydrogen?
Oxygen has a higher electronegativity.
What is Einstein's last name?
Einstein