Name ______Date ______Period ___

Alchemy Section IV Review

1.Complete the following table and write the names for groups 1, 2, 7 and 8

Group / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8
Valence
Electrons
Ion Charge
Lewis Dots

2.Unique flame colors are produced when the electrons in an atom:

(circle all that are correct)

A.gain energy

B.move from the excited state to the ground state

C.lose energy

D.move from the ground state to the excited state

E.are heated in a Bunsen burner

F.can be used to identify a nonmetal atom

3.Draw the Bohr model for the element calcium.

4.List all the facts you know about cations:

5.List all the facts you know about anions:

6.What is anionic compound? Describe how one forms.

Use sodium chloride an your example: what happens to sodium metal and chlorine gas in order to produce table salt?

7.Small elements form ions with only _____ valence electrons

Most other elements form ions with ____ valence electrons.

8.Given an example of a compound that has a 2:1 ratio? A 1:2 ratio?

  1. Provide each piece of information for element 17.
  2. The elements name ______and symbol _____.
  3. The total number of electrons in an atom ______.
  4. The period number ______and group number ______.
  5. The number of valence electrons ______.
  6. The number of core electrons ______.
  7. The name of an element that would have the same number of valence electrons ______.
  8. The name of an element that would have the same number of core electrons ______.
  1. Write correct formulas for compounds formed from each of the pairs below:
  1. potassium and phosphorus
  2. boron and nitrogen
  3. magnesium and fluorine
  4. lithium and oxygen

11.What color(s) of flame should be produced by lithium chloride (LiCl)?

Compound / Name / Flame color
BaCl2 / barium chloride / Green
LiBr / lithium bromide / Red
NaNO3 / Sodium nitrate / Orange
  1. Circle the letter of each statement that is correct.
  1. Core electrons decrease by one as you move across a period.
  2. Core electrons increase as you move across a period.
  3. Core electrons increase by one as you move down a group.
  4. Valence electrons increase by one as you move down a group.
  5. Valence electrons remain the same as you move across a period.
  6. Valence electrons only change when you start a new period.
  7. Halogens need one more valence electron to complete the outer shell.
  1. Fill in the correct numbers.
  1. Sodium has _____ core electrons and _____ valence electrons.
  2. Calcium has _____ core electrons and _____ valence electrons.
  3. Oxygen has _____ core electrons and _____ valence electrons.
  4. Iodine has _____ core electrons and _____ valence electrons.