Chemistry

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6

On the periodic table, nitrogen is represented by N (atomic number 7). N is a chemical

equation.

period.

symbol.

group (family).

Slide 60

Combustion - chemical reaction between a fuel and an oxidant, producing and light (flames).

Slide 61

Combustibility

The tendency to react with Oxygen, releasing heat.

O2

BURNING

Slide 62

H + O2

C + O2

N + O2

O + O2

Si + O2

Fe + O2

Common Oxides

H2O

NO2

CO2

O3

SiO2

Fe2O3

Compound o molecule ?

Slide 63

Which action would result in a chemical change?

crumpling several sheets of paper

pounding a nail into a piece of wood

peeling and slicing a carrot

making blueberry muffins

Slide 64

Metals and Non-metals prefer to react with each other.

One loses electrons,

the other gets electrons.

determine how it will react with other substances.

produce new substances which have new properties.

Slide 65

Lithium Fluorine

Slide 66

Chemical

Reaction Types

Bonds are made / broken

Change in oxidation states

Plasma

P+1

P+1

2

1

Li

+1

Slide 67

evidence of Chemical Change:

development of a gas

formation of precipitate

change in color

Slide 68

NOT a Chemical Change:

crystalization

fizz fluorescence

Slide 69

Precipitate the formation of insoluble ionic compounds.

Does NOT dissolve in water.

Slide 70

Happines

Unhappy

Unstable

HIGH energy

Happy

Stable

LOW energy

Slide 71

Reactants Products

(unstable) (stable)

Reactants Products

(stable) (unstable)

energy

energy

Slide 72

You get up in the morning and make toast for breakfast. You notice the color changes from light to dark. Later on that day in science class, your teachers asks for every day examples of physical and chemical changes.