Atomic Structure
Electrons
Periodic Trends
Calculations
Random
100
Which scientist discovered the electrons using the Cathode-ray tube experiment?
J.J. Thomson
100
How many electrons maximum can exist in n = 3 shell?
18
100
What is 'ionization energy'?
energy needed to remove 1 electron from an atom.
100
What instrument can we use to measure the mass of each isotope present in an element?
Mass spectrometer
100
What is the name of this hydrate:
CoCl2 * 6H2O
Cobalt (II) chloride hexahydrate
200
Name one difference between a deuterium atom and hydrogen atom.
Different mass, deuterium has 1 neutron, different physical characteristics
200
Why aren't emission spectrum continuous?
Electrons exist in quantum shell (energy level)
200
Ionization energy and atomic radium have what type of relationship?
Inverse relationship
200
What is the volume of one mole of gas at r.t.p?
24dm3
200
What are the products of a combustion reaction?
CO2 + H2O
300
Which way would a beam of protons bend in a Cathode-ray tube experiment?
Cathode (negative plate)
300
How many electrons can a d sub-shell contain?
10
300
What factors influence the ionization energy of an atom?
atomic radius, magnitude of nuclear charge, shielding effect, electron configuration (spin-pair repulsion, stability - filled orbitals 'Mg has higher IE1 than Al because of stable e- conf)
300
Use the % abundance of each isotope to calculate the relative atomic mass of germanium.
72.703
[(70 * 20.6) + (72 * 27.4) + (73 * 7.7) + (74 * 36.7) + (76 * 7.6)] / 100
300
What ionic compound will be produced in a neutralization reaction between sulfuric acid and ammonium hydroxide?
Ammonium sulfate
H2SO4 + NH4OH --> H2O + (NH4)2SO4
400
Explain how nucleon number can be calculated.
protons + neutrons
400
What is the electron configuration of sulfur?
1s2 2s2 2p6 3s2 3p4
400
How would you write an equation of IE3 for lithium atom?
Li2+(g) --> Li3+(g) + e-
400
What is the empirical formula of a compound containing 85.7% carbon & 14.3% hydrogen?
(C = 12, H = 1)
CH2
C: 85.7/12 = 7.142/7.142 = 1
H: 14.3/1 = 14.3/7.142 = 2
400
Calculate the relative atomic mass of the following sample of lithium:
6.93
[(6 * 7.42) + (7 * 92.58)] / 100
500
How many electrons are present in this ion?
18
500
What is the noble gas configuration of copper?
[Ar] 3d10 4s1
* swap the 3d & 4s spot
* better if the d-subshell is filled or half filled
500
The successive IE of element X are shown in the table below. Which group do you think element X belong to in the periodic table?
Group 6
(there're 6 valence electrons - lowest 6 IE and jump at 6-7)
500
What would be the ration of the M+ and [M+2] peaks of an organic compound containing one chlorine atom?
3:1
Cl-35 (M+): 75% abundant
Cl-37 (M+2): 25% abundant
500
What would be the ration of the M+ and [M+2] peaks of an organic compound containing one chlorine atom?
3:1
Cl-35 (M+): 75% abundant
Cl-37 (M+2): 25% abundant