Periodic table and trends
Bonding and Nomenclature
Lewis dot/VSPER/Polarity
Molar Mass and conversion
Misc
100
What is the charge of an electron?
-1
100
These bonds involve the transfer of electrons
Ionic
100
Draw the Lewis dot structure for water
100
What is the molar mass of NaI
149.89 g/mol
100
217
Rn
86
200
An atom has 15 electrons, 12 protons, and 16 neutrons. What is its mass?
28
200
A bond between two nonmetals in which electrons are shared
Covalent
200
How do lone pairs on the central atom affect bond angles?
Decrease them
200
How many moles of H2O are in 100 grams?
5.55 moles
200
Which nuclear decay type has the highest penetrating power?
Gamma
300
An atom has 10 electrons, 12 protons, and 14 neutrons. What element is that atom?
Mg
300
Name CH4
Carbon tetrahydride
300
Is SO2 polar?
Polar-due to lone pair on the S it is asymmetrical
300
If you see an answer with an E in your calculator, what does that mean?
Scientific notation. Change it to 10^
300
What did the cathode ray experiment discover?
Electrons
400
What is an atom's tendency to gain electrons in a bond?
Electronegativity
400
Name Na2O
Sodium oxide
400
What is the molecular shape of NH3
Trigonal planar
400
How many atoms are in 6.1 moles of gold?
3.67 * 10^24 atoms
400
A radioactive isotope decays with a half-life of 10 days. If a sample starts at 50 grams, how much will remain after 40 days?
3.125 g
500
Which halogen is in the 4th period?
I
500
What is the formula for iron (III) hydroxide
Fe(OH)3
500
What is the bond angle in CO2
180
500
Convert 175 g (NH4)2SO4 to moles
1.32 mol
500
What is the percent hydrogen in CH4
25.19%