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Periodic Table & Periodic Trends

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!!

Could someone please help me understand trends?????

My chem teacher is not the best ever and he didnt do a very good job explaining it. So if anyone could be of any help I would be very thankful...

Explain why Cl2 rather than Br2 would react more vigorously with a solution of I

Explain why Cl2 rather than Br2 would react more vigorously with a solution of I

Chemistry lab question , please help!

The periodic table of the elements contains many trends. During this lab, you will locate data on the Internet and prepare a data table and graph in order to explain some of these trends.

PROCEDURE:

  1. Use the Internet to locate data for the atomic radius for elements 1-56.
  2. Using graphing software, prepare a data table of the atomic radius and atomic number.
  3. Your graph (atomic radius on y axis and atomic number on x axis) should have all of the data points connected with a line.
  4. Repeat steps 1-3 for the ionization energy and electronegativity instead of atomic radius.

ANALYSIS:

  1. Copy your graph into an image manipulation program (such as Microsoft Paint).
  2. Draw distinct vertical lines at the end of each period.
  3. Select 2 different colours, which will be used to trace the trends in groups 2 and 16.
  4. Create a key (eg, group 2 = red, group 16=blue). Connect the points of each member of the group/family in the assigned color. 
  5. Repeat with the other colour, for the other group.

QUESTIONS

  1. State the consistent pattern you see in the graph when looking at the groups. What trend do you notice in atomic radius, ionization energy and electronegativity? 
  2. State the consistent pattern you see in the graph when looking at the periods. What trend do you notice in atomic radius, ionization energy and electronegativity?

 title page
 3 graphs (with analysis annotations)
analysis questions 10 and 11

Chemical Formulas from experimental data

A 0.77mg sample of phosphorous reacts with bromid=ne to form 10.70mg of bromide. What is the empirical formula od the phosphorous bromide? 

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