Do Now - Periodic Trends (Short)

Which ones of the following are true of electrostatic forces in the atom?

• Electrons repel other electrons

• Protons repel electrons

• Electrons attract neutrons

• Protons attract electrons

The atomic radius gets ​ (a)   as you go across a period in the periodic table. This is caused because the electrostatic force of ​ (b)   outweighs the electrostatic force of ​ (c)   .

• smaller
• attraction
• repulsion
• remains the same
• larger

The atomic radius gets ​​ (a)   as you go down a group in the periodic table. This is caused because the electrostatic force of ​​ ​ (b)   outweighs the electrostatic force of ​ ​​ (c)   ​​

• larger
• repulsion
• attraction
• remains the same
• smaller

What is an ion?

• An element with a change in electrons

• An element with a change in protons

• An element with a change in neutrons

How do you find valence electrons for the following blocks of the periodic table?

• FORGET ABOUT THE F -BLOCK!

• F - block

• group number

• D-block

• always 2

• S-block

• Group # - 10

• P-block

Based upon the number of valence electrons and the octet rule, what ion is most likely for Oxygen?