Unit 2 Homework (short)

Unit 2 Homework Mr. Barelt’s Chemistry class NOTE: You will be assessed on you knowledge of the atomic models. I have omitted this from your homework assuming that you will receive ample practice on the webquest. The validity of that assumption will be clarified by your test scores. (I’m not asking you any atomic model questions on your homework, but I will on the test)

1)

a) Create an electron diagram for sodium in orbital notation and electronconfiguration notation. b) For phosphorous

2)

a) Create an electron diagram for technetium (atomic # 43) in noble gas notation. b) For Bismuth

3) How does atomic radius change as you move left to right across a period? How does atomic radius change as you move top to bottom down a family? Explain why. 4) How does ionization energy change as you move left to right across a period? How does ionization energy change as you move top to bottom down a family? Explain why. 5) How does electronegativity change as you move left to right across a period? How does electronegativity change as you move top to bottom down a family? Explain why. 6)

a) Find the mass of 1.00 mole of aluminum. b) Find the mass of 7.50 moles of arsenic.

7)

a) How many atoms are in 1.00 moles? b) How many atoms are in 0.0750 moles

8) Find the mass (in grams) of 3.011*1024 atoms of Calcium. 9)

a) What is the frequency of electromagnetic radiation with a wavelength of 3.00*10-12m? b) What is its energy?

10)

a) What is the wavelength of electromagnetic radiation with a frequency of 18 billion Hz? b) What is its energy?