6 Written Questions

1. -----is the negative energy change that occurs when an electron is accepted by an atom in the gaseous state to form an anion
2. ------discovered the atomic nucleus and protons
3. basic elements are common in columns with charges --- to ---
4. electrons alway------
5. one-half the distance between the nuclei of identical atoms that are bonded together; 90% of the electron density is found for the 1s orbital
6. -----is the minimum energy required to remove an electron from a gaseous atom in its ground state

5 Multiple Choice Questions

1. When a cation is formed from an atom of a transition metal electrons are always removed first from the ---- orbital and then from the -----orbital.
   1. up; right
   2. 1+ to 2+
   3. up;right
   4. ns; (n-1)d
2. effective nuclear charge trend is ---- and to the -----
   1. up; right
   2. positive
   3. repel
   4. up;right
3. -----developed the periodic table using masses of elements and their chemical properties
   1. Dmitri Mendeleev
   2. Henry Mosely
   3. left; down
   4. repel
4. cation is always ----- than the atom from which it was formed. an anion is always ------ the atom from which it was formed.
   1. Rutherford
   2. left; down
   3. smaller; larger
   4. up; right
5. -------discovered a way to measure nuclear charge w/x-rays. He called this the atomic number
   1. repel
   2. left; down
   3. 1+ to 2+
   4. Henry Mosely

5 True/False Questions

1. positive → effective nuclear charge trend is ---- and to the -----

   True        False

2. left; down → basic elements are common in columns with charges --- to ---

   True        False

3. effective nuclear charge → cation is always ----- than the atom from which it was formed. an anion is always ------ the atom from which it was formed.

   True        False

4. amphoteric → having characteristics of both an acid and a base and capable of reacting as either

   True        False

5. up; right → FIRST ionization trend (increasing) is ---- and -----

   True        False