NEW
Font size
WorksheetsAttempts of elements classification - part 1
Total questions: 10
Worksheet time: 5mins
The scientist who discovered that the nucleus of the atom contains positively charged protons is ...............
Mendeleev
Bohr
Rutherford
Moseley
The scientist …….......... discovered the main energy levels.
Moseley
Bohr
Rutherford
Mendeleev
Elements are arranged in Mendeleev's periodic table in an ascending order according to …..........
atomic weight
atomic number
chemical activity
valency
The number of energy levels in the heaviest known atom is ……….. levels.
5
7
8
10
Elements in ................ periodic table are classified according to their atomic numbers in an ascending order and the way of filling of the energy sublevels with electrons.
Moseley's
Mendeleev's
Rutherford's
the modern
Mendeleev left gaps in his periodic table because he predicted the discovery of other elements in the future.
True
False
In the modern periodic table, the s block contains ...... groups while the p block contains ........ groups.
2 , 8
2 , 6
8 , 6
2 , 2
In the modern periodic table, the A groups are found in the s and p blocks.
True
False
The scientist ............... added the zero group for the inert gases and lanthanides and actinides groups below the table.
Mendeleev
Bohr
Moseley
Rutherford
The f block contains ....... groups and can be found ......... the periodic table.
6 , on the right side of
8 , in the middle of
2 , on the left side of
2 , below
