5th Grade-Ch. 11 Lesson 2 How do atoms combine

Ch. 11Lesson 2

How do atoms combine?

atom•smallest particle of an element that still has the properties of that element

center of atom

no electrical charge

positive charge

negative charge

periodic table

organizes elements

arranged inrows by

# of protons

elements incolumns have

similar chemicalproperties

molecule• smallest particle of a substance that has properties of that substance

• share electrons

compound•made of combination of elements

•prop. of compounds - different from prop. of elements that make them up

+

+ =C6H12O6

carbon= C hydrogen= H

oxygen= O

• ex. C6H12O6 = glucose (sugar)

– 6 carbon atoms

– 12 hydrogen atoms

– 6 oxygen atoms

salts• compounds - particles held together by opposite charges

• made of 1 metal element & 1 nonmetal element

• form crystalsNaCl

sodium + chlorine

NaCl, Table Salt Crystals 79XNaCl, Table Salt Crystals 79X

ACTIVITY-MAKING MOLECULES

1.1. HH22O

2.CO2

3.C2HH44

4.CClCl44

5.C6HH1212O6

Blue- Nitrogen- NBlue- Nitrogen- N

Yellow- Hydrogen- Yellow- Hydrogen- HH

Black- Carbon- CBlack- Carbon- C

Green- Chlorine- ClGreen- Chlorine- Cl

Purple- Iodine- IPurple- Iodine- I

Fluorine- FFluorine- F

Red- Oxygen- ORed- Oxygen- O

Orange- Bromine- BrOrange- Bromine- Br

6. Make your own molecule, use at least 4 different types of elements.

Name your compound.

# of marbles Color of marbles

6 black

2 Light blue

15 Yellow

4 Red

4 Green

2 purple

2 orange