Periodic Trends
Atomic Theory
Chemical Bonding
Chemical Reactions
Mole Theory
100
Which of the following has the largest atomic radius, Calcium or Bromine?
Calcium
100
What contributions did Ernest Rutherford make to the modern atomic theory?
(1) atoms are composed mostly of empty space, and (2) at the center of every atom is a dense positively-charged center called a nucleus
100
What is the formula of Iron (III) Perchlorate?
Fe(ClO4)3
100
What type of reaction is taking place? CH4 + O2 ---> CO2 + H2O
combustion
100
How many atoms are in 2.8 moles of Copper? Check sig figs and units
1.7 x 10^24 atoms Cu
200
Place the following elements in ascending order (smallest to largest) based on electronegativity. Phosphorus, Zirconium, Oxygen, and Silver
Zirconium, Silver, Phosphorus, and Oxygen
200
What is the electron configuration of Iron?
1s2 2s2 2p6 3s2 3p6 4s2 3d6
200
What is the name of this hydrate? Ni(NO3)2 . 6H2O
Nickel (II) Nitrate Hexahydrate
200
What are the coefficients of the chemical equation? __ NaOH + __ FeCl2 ---> __ NaCl + __ Fe(OH)2
2, 1, 2, 1
200
What is the mass of 4.95 moles of NaCl? Check sig figs and units
289 g NaCl
300
What is the trend for group 1 elements in regards to reactivity?
As you go down the group, reactivity increases. Cesium is the most reactive.
300
What is the isotope notation for an atom that contains 34 protons, 47 neutrons, and 36 electrons?
81 2- 34 Se
300
The bond between nitrogen and sulfur is considered to be _____________.
polar covalent
300
Which type of chemical reaction has one reactant forming multiple products?
decomposition reaction
300
How many particles are in 341.2 grams of iron (III) oxide? Don't forget sig figs and units.
1.287 x 10^24 particles Fe2O3
400
What is the general trend for ionization energy?
As you go across a period, ionization increases. As you go down a group, ionization decreases.
400
This is the orbital diagram of Germanium.
II II II II II II II II II II II II II II II I I 1s 2s 2p 3s 3p 4s 3d 4p
400
What is the lewis structure of sulfate (charge is -2).
see drawing
400
Balance the following reaction. __ CO2 + __ H2O ---> __ C6H12O6 + __ O2
6, 6, 1, 6
400
What is the empirical formula of a compound that is composed of 57.14% C, 6.16% H, 9.52% N, and 27.18% O?
C14H18N2O5
500
Which of the following elements has the highest density? Potassium, Fluorine, Copper, or Selenium
Copper
500
What is the average atomic mass of the unknown element? X-68 (49.2%) X-69 (27.8%) X-71 (23.0%)
68.9 amu
500
What is the Lewis structure between aluminum and sulfur?
see drawing
500
Balance the chemical equation. __ NaNO3 + __ Al2(SO4)3 ---> __ Na2SO4 + __ Al(NO3)3
6, 1, 3, 2
500
Calculate the molar mass of iron (II) acetate tetrahydrate. Don't forget units!
245.9 g/mol
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