1. Who is Henry Mosley? 2. What did Henry Mosley contribute to the Periodic Table and science?
3. What are the 4 periodic table trends?
4. Define each periodic table trend?
5. What is the molar mass of the following compounds (you need the periodic table): NaCl, MgO, CuO
6. Solve 30 g of NaCl Liters (Hint 1 mole = 22.4 L and you MUST convert from grams to moles)
7. Solve 3.5 moles molecules
8. Solve 300 molecules moles
9. What is an isotope? Explain + Give me 1 example.
10. What is an ion? What subatomic particle does an ion effect?

what does the table look like

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.