Chemistry

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5

Covalent Bond

The sharing of a pair of electrons between 2 atoms.

Cl2

Slide 47

Common chemicals

H2O2

NH3

NaOH

NaClO

I2

Compound o molecule ?

Slide 48

Metallic Bond the sharing of valence

electrons by neighboring metal atoms.

Slide 49

Slide 50

Oxygen naturally occurs in which physical state?

solid

liquid

gas

plasma

Slide 51

Chemical

Reaction Types

Bonds are made / broken

Change in oxidation states

Plasma

P+1

P+1

2

1

Li

+1

Slide 52

Chemical properties/ changes/ reactions (i.e., reactivity, combustibility).

development of a gas, formation of precipitate, and change in color).

Reactivity

Combustibility

Gas formation

Precipitate

Color change

Slide 53

A difference between physical change and chemical change is that

chemical change involves energy while physical change does not.

physical change involves energy while chemical change does not.

different kinds of molecules are present after a physical change but not after a chemical change.

different kinds of molecules are present after a chemical change but not after a physical change

Slide 54

Reactivity

The tendency to undergo a chemical change.

ree ack tih vih T

Slide 55

NON

reactive

H

Li

Na

Be

Mg

B

Al

C

Si

N

P

O

S

F

Cl

He

Ne

Ar

Reactivity

Mo

Less

Mo

Less

Slide 56

Calorimeter

crystal lab

carbohydrate lab

fatty acid lab

amino acid lab

convection lab

density lab

density II lab

radioactive decay lab

Slide 57

Which picture shows only a physical change in the wood?

Slide 58

Hydrogen-VERY reactive.

Helium-Non-reactive.

Slide 59