1. how is the modern periodic table organized? 2. what information about an atom's properties can you read from the periodic table? 3. how are the relationships of elements in a group different from the relationships of elements in a period? 4. would you expect strontium (sr) to be more like potassium (k) or bromine (br)? 5. barium (ba) is in group 2. recall that atoms in group 1 lose one electron to form ions with a 1+ charge. what type of ion does barium form?

1. How is the modern periodic table organized?  Increasing atomic number

2. What information about an atom's properties can you read from the periodic table?       Metal or not metal. Does it want to gain or lose electrons

3. How are the relationships of elements in a group different from the relationships of elements in a period?  a group will have similar properties A period will have different properties

4. Would you expect Strontium (Sr) to be more like potassium (K) or bromine (Br)?  

potassium

5. Barium (Ba) is in Group 2. Recall that atoms in Group 1 lose one electron to form ions with a 1+ charge. What type of ion does barium form?  Ba+2

the formula would be mgso4

mgso[subscript]4