Life on the Edge HW
(place your answers on page 74 in your notebook)
1. Provide the following information for element number 55.
 What element has atomic number, 55?
 How many protons are in the nucleus?
 Speculate on the number of neutrons in the nucleus.
 How many electrons does a neutral atom of this element have?
 How many of those electrons are core electrons? How did you determine
that?
 How many valence electrons does this element have?
 What group is it in?
 What other elements have similar chemistry? How do you know?
2. Answer the same questions as above for element number 82.