2. Atoms and the Periodic Table

Draw the Lewis Dot symbol for the following element:Sr

Draw the Lewis Dot symbol for the following element:Pb

Draw the electron-dot symbol for the following element:Rn

Write the group number and draw the Lewis symbol for each of the following elements:

e. gallium

Write the group number and draw the Lewis symbol for each of the following elements:

c. calcium

An unidentified element is found to have an electron configuration by shell of 2 8 18 8 2. To what group and period does this element belong? Is the element a metal or a nonmetal? How many protons does an atom of the element have? What is the name of the element? Write its electron-dot symbol.

Consider the following Lewis symbols for elements X and Y:

c. What ions would be formed by X and Y?

Consider an ion with the symbol X²⁺ formed from a representative element.

b. What is the Lewis symbol of the element?

Consider an ion with the symbol Y^3- formed from a representative element.

b. What is the Lewis symbol of the element?