21. | Vertical columns in the periodic table are called |
A. cycle | |
B. square | |
C. electrochemical sequence | |
D. nonmetal |
22. | The horizontal columns in the periodic table are called |
A. cycle | |
B. square | |
C. electrochemical sequence | |
D. nonmetal |
23. | What is the total number of groups in the modern periodic table? |
A. 7 | |
B. 9 | |
C. 16 | |
D. 18 |
24. | What is the total number of periods in the modern periodic table? |
A. 5 | |
B. 7 | |
C. 9 | |
D. 16 |
25. | The elements are arranged in the modern periodic table |
A. in decreasing atomic mass | |
B. increasing atomic mass | |
C. increasing atomic volume | |
D. increasing atomic number |
26. | The originator of the modern periodic law is |
A. mosley | |
B. mendeleev | |
C. Avogadro (Avogadro) | |
D. Dalton |
27. | who is the father of periodic table of elements |
A. johannes vanderwals | |
B. johan baer | |
C. Alfred Nobel | |
D. Dmitri Mendeleev |
28. | The long form of the periodic table depends on |
A. on the size of the atom | |
B. on the mass of the atom | |
C. on atomic number | |
D. on electronegativity |
29. | Which of the following is the modern periodic table based on |
A. atomic volume | |
B. atomic number | |
C. atomic mass | |
D. atomic size |
30. | Who propounded the law that the physical and chemical properties of elements are periodic functions of their atomic number? |
A. mendeleev | |
B. mosley | |
C. Newlands | |
D. rutherford |