مراجعة ساينس تانية إعدادي ترم أول 2024 2025 pdf

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مراجعة ساينس تانية إعدادي ترم أول

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1- The first real periodic table to classify elements

 2- They are indicated by letters K,L,M,N,O,P&Q.

3- They are indicated by letters s,p,d&f.

4- A kind of elements located at middle of the periodic table.

5- A part of millions of millions of meter.

6- It's the ability of the atom in covalent molecule to electrons of the chemical bond towards itself.

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7- They are compounds that have big difference in electronegativity between its elements.

8- Elements have less than four electr

in outermost energy levels

9- Elements have more than four electrons in outermost energy levels

10- Atom of a metallic element which lost electrons during the chemical reaction.

11- Atom of a non-metallic element which gains electrons during the chemical reaction.

12- Atom which loses or gains electrons during the chemical reaction.

 13- Elements which have the same properties of metals and non-metals

14. It is the arrangement of metals descendingly according to their chemical activity.

15- Non-metallic oxides that dissolve in water forming acidic solution.

16- Metallic oxides that dissolve in water forming alkaline solution.

17- The biggest atom in the modern periodic table.