اختبار الكتروني درس Graduation of the properties of Elements in the Modern Periodic Table

1
The atomic radius is used as a measurement of the atomic size of the atom and its measuring unit is.....
2
In period (2),the atomic size of oxygen (O8) is greater than that of.......
3
In periods,by increasing the atomic number,the...........
4
Which of the following elements is a metallic element?..........
5
During the chemical reactions,metal atoms tend to ........
6
An element(x),whose atomic number is 13 so,the number of electrons in its ion is.........
7
The electronic configuration of sodium ion(Na+) is similar to that of.........
8
The electronic configuration of magnesium ion(Mg+2)is similar to all the following except.........
9
The difference between chlorine (Cl17) atom and chloride ion (Cl-)is the number of.........
10
If you know that the atomic number of an element=11, which of the following figures represents the electronic configuration of its ion?