2. Atoms & Elements

Which element possesses a -2 charge when it combines with other elements?  

What is the likely charge of the element with an atomic number of 47?

How many electrons would the cadmium ion possess?  

Does the following drawing represent a neutral atom or an ion?

Five of the boxes in the following periodic table are colored. Predict the charge on the ion associated with each of these elements.

Determine the number of valence electrons in each element. Which elements do you expect to lose electrons in chemical reactions? Which do you expect to gain electrons? a. Al b. Sn c. Br d. Se

Each of the following elements is capable of forming an ion in chemical reactions. By referring to the periodic table, predict the charge of the most stable ion of each: (a) Be (b) Rb (c) As (d) In (e) At.