Element found in period four and group 5B, its atomic number is ........
Periodicity of elements and their properties

Quiz
•
Chemistry
•
8th Grade
•
Hard

Ibrahiem Thabet Elnaggar Thabet
Used 15+ times
FREE Resource
11 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
21
22
23
24
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The smallest atomic size of the following is ...........
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Elements whose atomic numbers from 1 : 18 occupy ...... periods in the modern periodic table.
1
2
3
4
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
An element which is located in the third period and group 13, the number of neutrons in its nucleus equals 14, so its mass number equals .........
30
27
24
20
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The chemical formula of Rubidium oxide is ............
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Three elements (X, Y, Z) lie in the same period in the periodic table, if oxide of element (X) reacts with acids and bases, oxide of element (Y) reacts with bases only and oxide of element (Z) reacts with acids only. what is the correct order of atomic numbers of these elements?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
16, 23
18, 23
18, 32
16, 16
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