If you know anymore questions or answers please reply. Let me know if I made any mistakes
What is the full electronic configuration of Al? 1s2,2s2,2p6,3s2,3p1
What is the full electronic configuration for Cr+3? 1s2,2s2,2p6,3s2,3p6,3d3
What is the formula of the atom with same electronic configuration of Krypton 2+?
Sr (strontium)
What compound has a +2 and -3 ions and has the same number electrons as Argon?
Ca2P3
Which ion has a smaller atomic radius Mg2+ or Na+?
Mg 2+
because has the same number of electrons, same shielding but more protons. So greater nuclear charge and attraction for outer electrons.
What is the first ionisation energy of Na?
Na (g) --> Na+ (g) + e-
Diagram-Mark where the Mg or was it Si?
Was and then mark the point where Sulphur was on the First ionisation graph.
Mg/Si should have been above so the line was increasing.
Sulphur should have been below Phosphorus but above Silicon.
Why does Sulphur have a different first ionisation energy compared to Phosphorus?
-Both have same shielding and in the same orbital the 3p orbital
-Sulphur is paired with an electron in the 3p orbital whilst Phosphorus isn’t
-There’s repulsion between the negatively charged electrons
-So electrons are easier to remove
Why does Bromine have lower boiling point than Magnesium?
-Bromine has a simple molecular structure.
-There’s weak Van der Waals forces between molecules.
-So smaller amount of energy needed to break these forces.
-Magnesium has a metallic lattice.
-It has many strong metallic bonds.
-Bonds formed from the strong attraction between positiveions and delocalised electrons.
-The metallic bonds are stronger than the Van der Waals forces
How do the ions get accelerated, detected by TIF and how abundanceis measured?
- Accelerated by negative electric field
-The ions reach the detector andgenerate a small current, which is fed to a computer for analysis. The currentis produced by electrons transferring from the detector to the positive ions.The size of the current is proportional to the abundance of the species.
Suggest why Magnesium has a longer melting point than Bromine. (Something like that?)
-It has much more bonds than Bromine. So more bonds are needed to be broken when melting.
a) Calculate the mass of Ammonia in Q?
Basically use the ideal gas equation and usethe temp given, multiply the pressure by 1000 to convert it to SI Units, divide the volume by a million to convert to m^3 . Then use everything given to find the number of moles in Ammonia. Then find the mass of Ammonia using the mr.
b) Calculate the volume in P given that the temperature decreased by 5 degrees and the total pressure is 75kPa?
-Find volume of the whole system with the new values and use moles from previous question
-Then subtract from the volume of Q given.
Draw NH3 and AlCl3 and write the bonding angle.
NH3- 1 Lone pair and 3 bonding pair. Should have drawn a trigonal pyrimidal.
Bond angle- 107
AlCl3- 3 bonding pair so Trigonal Planar
Bond angle- 120
What type of bond between NH3 and AlCl3 tomake 3HNAlCl3?Dative covalentElectron pair donated from NH2 to AlCl3.