Acids and alkalis | Prep.1 | Unit 1 - Lesson 2 | Science

Описание: شرح ساينس الصف الأول الاعدادي لغات - الفصل الدراسي الثاني
شرح ساينس الاول الاعدادي - ترم تاني

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In This Part :
The following are examples of some cations and anions :
Atomic Group
An ion that is composed of more than one atom of more than one element is referred to as a polyatomic ion or an atomic group.
Atomic Group
An ion composed of more than one atom of more than one element.

Acids and Alkalis
The following table shows examples of some acids that
1. do not contain oxygen:

2. contain oxygen:

The importance of acids in our lives
Alkalis
The following table shows examples of some alkalis and the cations which compose them:
Properties of Acids and Alkalis
There are many acids and alkalis in your home

It is clear from the previous that

Acids and alkalis conduct electricity to variant degrees according to their strength, acids can be classified according to their ability to conduct electricity into:

Metals and Nonmetals Oxides
When a metallic or nonmetallic element burns in the presence of oxygen, a compound is formed known as an oxide. There are several types of element oxides, including :

Acid Rains
Burning of fossil fuels (such as petrol and coal) in cars, power plants (power stations), and factories causes the evolution of acidic oxides such as nitrogen dioxide NO2 and sulphur dioxide SO2 The dissolution of these oxides in atmospheric water vapor and their accumulation in the clouds leads to precipitation (falling rains) known as acid rains.

Acid Rains
Rain resulting from the dissolution of acidic oxides in atmospheric water vapor.

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