Drill How many valence electrons does sulfur have?

Agenda 2A: Electron Stability Finish Periodic Trends Activity Periodic Trends Notes Periodic Trends Practice Exit Slip HW: Review Packet

Atomic Radius One half the distance between the nucleus of two bonding atoms

Atomic Radius Trends: Decreases from left to right Stronger nuclear charge on the right pulls electrons closer to the nucleus Increases from top to bottom Increased number of energy levels In a period the electrons are all on the same principle energy level, they are pulled closer to the nucleus The outer electrons are shielded from the nucleus by the complete inner shells

Ionization Energy The amount of energy required to remove the outermost electron of an atom of an element

Ionization Energy Trends: Increases from left to right Metals on the left side prefer to give up electrons to form a stable octet Nonmetals on the right side want to take electrons, not give them up Decreases from top to bottom Shielding makes it easier to remove electrons from larger atoms because the e- are farther away from the attraction of the nucleus

Electronegativty The tendency for an atom to attract a pair of bonding electrons when it is combined with another atom in a chemical bond

Electronegativity Trends: Increases from left to right Nonmetals prefer to gain electrons, whereas metals prefer to lose electrons Decreases from top to bottom The smaller the atom is, the greater the attraction felt by the nuclear charge

**Coach Class: After school on THURSDAY! Looking forward Review: Thursday Unit 2 Test: Monday **Coach Class: After school on THURSDAY!

Homework Finish Review Packet