O2 C6H12O6 H2O CO2 H2 Na OH K CH4 NaCl C8H18 Ca C2H6O Co O3 Atom / Molecule / Element / Compound Practice O2 C6H12O6 H2O CO2 H2 Na OH K CH4 NaCl C8H18 Ca C2H6O Co O3 molecule compound compound Element / atom compound molecule Element / atom compound compound Element / atom compound compound Element / atom compound molecule

attraction force holding Oct 29 / 30 Act B17 Modeling Molecules LEARNING TARGET: I can construct models of molecules by combining different atoms and explain how atoms combine to form a variety of different molecules with various atom arrangements CH Q How do atoms combine to form molecules? VOCAB: chemical bond attraction force holding atoms together

Periodic Table Patterns – Atomic mass: - The mass increases as you go left to right - The mass increases as you go down the table - As the mass increases, so does the size of the atom Reactivity: groups one and two - The reactivity increases as you go left to right - The reactivity increases as you go down the table As the mass of the atom increases, so does the reactivity!

Periodic Table Patterns – groups eight Atomic mass: - The mass increases as you go down the table - As the mass increases, so does the size of the atom Reactivity: - The reactivity decreases as you go down the table As the mass of the atom increases, the reactivity decreases!

PROCEDURE AND DATA MATERIALS: PROCEDURE: Read on pg. B-31-33 and summarize DATA: WS 16.1 Periodic table Notes in Journal

POST DISSCUSSION: What information do the models show about atoms, elements, and molecules? how many bonds an atom of an element can make (H = 1, O = 2, N = 3, C = 4) 2. Given that nitrogen (N) forms three (3) bonds with hydrogen (H) to make NH3, how many hydrogen (H) atoms do you think will bond to an atom of phosphorus (P)? also 3 - because P is in same Group/Family as N

Single Bond versus Double Bond

- Discuss and answer Q 3-7 on pg. B- 33 ANALYSIS - Discuss and answer Q 3-7 on pg. B- 33 ANS CH Q How do atoms combine to form molecules? A: chemical bonds between atoms form molecules HOMEWORK 1. Finish Analysis Qs