اختبار الكتروني كتاب العلوم لغات

اختبار خاص بالمعلم: Omar Ali El-said
مدة الاختبار: 0:30:00
الوقت المتبقي: -:-:-
1

If you know that the atomic number of an element=11, which of the following figures represents the electronic configuration of its ion?

2
The electronic configuration of magnesium ion(Mg+2)is similar to all the following except.........
3
The atomic radius is used as a measurement of the atomic size of the atom and its measuring unit is.....
4
During the chemical reactions,metal atoms tend to ........
5
The electronic configuration of sodium ion(Na+) is similar to that of.........
6
In period (2),the atomic size of oxygen (O8) is greater than that of.......
7
Which of the following elements is a metallic element?..........
8
-..............is(are)of the most important causes of the extinction in recent ages.
9
-..................indicate(s)extinction
10
-...........were famous extinct animals in old times
11
Which of the following statements is more precise in describing the concept of extinction?.............
12
-............is/are from the hypothetical theories that explain the causes of macro extinction.
13
-...........is an extint bird,which was characterized by the reduced size of its wings
14
-................is conciderd the midway between horse and zebra
15
-All the following are endangered species except..............
16
Fossils are found in......rocks
17
Ammonite fossil represents a mold of a/an .........
18
Complete body fossils of insects are found preserved in............
19
When mud fills up the shell cavities and solidity,then shell decomposes,......is produced
20
On the solidification of the resinous matter secreted by pine trees in the old geological periods,it forms........
21
What's the kind of fossil that is formed when a plant leaf falls on a soft sedimentary rock at the beginning of formation then hardening?
22
Worms' tunnels fossil is formed because of.................
23
Temperature decreases by.......at 2 km above sea level
24
A decrease in temperature at any height in troposphere is given by........
25
As the density of air increases,the atmospheric pressure.........
26
-.........is an instrument used by pilots in aeroplanes to measure their elevation above sea level based on atmospheric pressure
27
The measuring unit (s) of atmospheric pressure is (are)........
28
A device that is used in measuring the atmospheric pressure is...........
29
Atmospheric pressure is the .........of air column of an atmospheric height on a unit area
30
The modern periodic table consists of .......horizontal periods
31
The scientist, who discovered that the nucleus of atom contains positively charged protons is..........
32
Mendeleev classified the elements of each group into ...........sub groups
33
The nucleus of the atom contains.........
34
The scientist ...........had discovered the main energy levels
35
The number of energy levels in the heaviest known atom is.........levels
36
The number of known elements in the modern periodic table till now is........
37
Ozone layer absorbs .........
38
Ozone degree is measured in a unit called ........
39
Ozone layer locates in........layer
40
Ozone layer allows 100%of the......UVrays to penetrate the Earth's atmosphere
41
Scientist........proposed that the thicness of ozone layer is about 3 mm under the standard temperature and pressure
42
Ozone gas molecule consists of........
43
One Dobson unit (DU)is defined as......
44
Degree of ozone at STP condition is......Dobson
45
The metalic property of alkali metals increases by increasing their.........
46
Sodium and Potassium are kept under the surface of ........
47
Which of the following elements is an alkali metal which locates in period three?....
48
The gas evolved on reacting alkali metal with water is.........
49
Hydrogen element belongs to........
50
Most alkali metals have..............density