جميع المواضيع المتعلقة بـ ‘theory’

 

The scientific method:  To understand a given phenomenon.

The scientific method:  To understand a given phenomenon.

Steps in scientific method

1- Making observation

Qualitative : no numbers

Example: The sky is blue and water is liquid

Quantitative (called measurement): number+ unit Example: Water boils at 100 °C

2- Formulating hypothesis

Hypothesis is a possible explanation for an observation

3- Performing experiments to test hypothesis:

To…

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kinetic molecular theory

kinetic molecular theory

1 – The particles are so small compared with the distances between them that the volume of the individual particles can be assumed to be negligible (zero).

2  – The particles are in constant motion. The collisions of the particles with the walls of the container are the cause of the pressure exerted by the gas.

3 – The particles are assumed to exert no…

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NATURE AND SCOPE OF CHEMISTRY

NATURE AND SCOPE OF CHEMISTRY

Chemistry. It is the branch of science which deals with the composition, preparation and properties of the substances.

Main branches of chemistry: (1) Inorganic chemistry (2) Physical chemistry (3) Organic chemistry (4) Biochemistry (5) Analytical chemistry (6) Agricultural chemistry (7) Industrial chemistry.

Scientific Methods : The scientific method consist of the following five steps :

1 -…

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ملخص الفصل الأول :أساسيات الكيمياء للعالم زومدال Chapter 1 chemistry foundation Notes Zumdahl AP

ملخص الفصل الأول أساسيات الكيمياء للعالم زومدال Chapter 1 chemistry foundation Notes Zumdahl

الكيمياء العامة 1 ، الكيمياء العامة 101 ، General Chemistry

 

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Atomic Theory

Dalton’s Model of the atom. It is the basis of our understanding of the nature of matter. The following four statements comprise Dalton’s Model:

a –  All matter is made up of extremely tiny. particles. called atoms.

b-  Atoms are indivisible.

c – Atoms of the same element are alike.

d –  Atoms of different elements are different.

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