Periodic Table & Periodic Trends

Ionization Energy

The ionization energy of vanadium from the ground state is 650.2 kJ/mol. Assume that the transition of 376 kJ/mol was from the ground state to an excited state. If that is the case, calculate the ionization energy from the excited state. 

The answer in my textbook is 274 kJ/mol, I just don't know how to get that answer, so any help would be greatly appreciated. 

Magnesium + steam , is reaction reversible?

Q : What won't be observed when magnesium reacts with steam?

Choices : - Hydrogen will be produced

- Magnesium hydroxide formed

-Magnesium Oxide formed

- Reaction can't be reversed


I know Mg + H2O --> MgO + H2. This means first and third choices are out. Now, the problem is, how do I know if the last choice is true? Is the reaction is reversible?

Calculate Atomic Mass of The Elements Assuming the Isotopic Composition is Given

Basically, I need help with Group V, this isn't HW or anything I just wanted extra practice for next year but I don't even understand what the question is asking me, I know what an isotope is, what atomic mass is, I understand the A, Z thing (A = mass #, Z = atomic #/protons) and I know the formula for atomic mass. Yet 45 minutes later watching YouTube videos and doing example problems, I still don't know how to solve that one. Help would be much appreciated. Am I looking to find the atomic mass of Group V or the atomic mass of Group VI or what exactly?

Fill in the gaps in the following tables

I have absolutely no idea how to even start answering this question. I need help calculating the protons, neutrons and electrons. I am very lost :( 

I need help with this chemistry question?

Atoms of the element beryllium would most likely behave similar to the way _______ behaves.

Balancing Eqn

Please tell me the step of balancing this eqn.

Creating Periodic Table with Quantum Rules

      For the quantum rules listed, build the periodic table. Use the same element names as our known periodic table. n= 1 to 4, l= 0 to n, ml= 1, ms= 1

Why do beryllium, nitrogen, neon, etc. not follow the electron affinity trend?

Why do beryllium, nitrogen, neon, etc. not follow the  electron affinity trend?

Why did the Element wolfram change its name to Tungsten?

I am taking Chemistry in High School and our teacher told us to find why the Element Wolfram changed its name to Tungsten. I am not able to find information on why the name change. I know where it came from but don't know why it changed. Thank You for your help!!


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