Spectroscopy
Mass spectroscopy provides what data regarding the element?
The relative abundance of different atomic mass or isotopes regarding an element.
Rate these 3 elements from most to least metallic: Cl,Ba ,Fe.
Ba,Fe,Cl
Within the sublevels the 2s orbital can hold 2 electrons how many electrons can be held in the 2p orbital?
6
What percent of Oxygen is there in a pure mixture of N2O4?
69.55%
What's the atomic mass of NaCl?
58.443 grams
Photoelectron spectroscopy provides what data in regards to elements?
The arrangement of electrons with different energy levels into sub-cells.
Which element has a smaller atomic radius: Phosphorus,Potassium, or Aluminum?
Phosphorus
What is the Noble Gas configuration of Mn?
[Ar] 4s2 3d5
Based on the molecular formula of C6H12O6: what’s the empirical formula of Glucose?
CH6O
What is the mass of 42.06 mols of Gold?
0.390 grams
A Mass spectroscopy graph of an element shows 3 different masses 39, 40 , 41 the masses have an abundance of 90%, 3%, and 7% in their representative order. Based on this data what element is this graph most likely to show?
Potassium
Rate these elements from least to most Ionization energy: Oxygen, Sodium, Sliver.
Sodium, Sliver, Oxygen
Two students were practicing writing their electron configurations for Cd. Student 1 writes: 1s2 2s2 sp6 3s2 3p6 4s2 3d10 4p6 5s2 4d10, Student 2 writes: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2. Which student is correct?
Student 1
A pure sample of KCl contains 47.6% of chlorine by mass which of the following will up the percentage of chlorine the most: NaCl, CsCl, or LiCl?
LiCl
How many moles are in 247g of Mn?
4.50 moles
A student notices in a PES spectrum one peak is higher than another. What can be concluded from this?
That the higher peak has more amount of electrons within that sub-level.
Which Element has a smaller radius and is more electronegative: Iodine, Chlorine, or Bromine?
Chlorine
An unnamed element has an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10, if an electron were to be removed, According to Coulomb's law from which of the sublevels is it going to be removed from?
4s2
A compound is found to contain 23.3% Magnesium, 30.7% Sulfur,and 46.0% oxygen. What is the empirical formula of this compound?
MgSO3
How many grams are there in 0.56 moles of H2O?
10.09 grams
A mass spectroscopy graph for chlorine shows two peaks, one is the mass of 35 with a relative abundance of about 75% and the other at 37 with a relative abundance of about 25%. Based on this data what is the atomic mass of the Chlorine element?
35.5 u
Which element that has 4 valence electrons also has the largest Radius?
Lead
A Pes spectrum for a neutral element shows peaks. From closest to highest binding order the heights of the peaks are 2,2,6,2,5. What is the electron configuration for this element?
1s2, 2s2, 2p6, 3s2, 3p2
When a 15.67 g sample of an unknown hydrate of Magnesium Carbonate, MgCO3 -x H2O, is heated H2O is driven off. The mass of the anhydrous Magnesium Carbonate that remains is 7.58g. What is the value for x in the hydrate?
5
How many formula units are in 145g of CaCl2?
5.97 x 10^22 units