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Question
State whether true or false. If false, correct the statement.
Newlands’ periodic table is based on atomic masses of elements and modern periodic table is based on atomic number of elements.
Options
True
False
Solution
Newlands’ periodic table is based on atomic masses of elements and modern periodic table is based on atomic number of elements- True
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RELATED QUESTIONS
The atomic number of an element is more important to the chemist than its relative atomic mass. Why?
Complete the table:
|
Atomic number |
Element |
Electronic configuration |
Select an element of the same group |
|
11 |
Sodium |
|
(Ca/N/K)… |
|
15 |
Phosphorus |
|
(Ba/N/Rb)… |
|
16 |
Sulphur |
|
(F/Cl/O)… |
|
9 |
Fluorine |
|
(Ca/Cl/K)… |
Relative atomic mass of a light element up to calcium is approximately ______ its atomic number.
An element A has 2 electrons in its fourth shell. State:
its atomic number
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Give a reason for the following:
Properties of elements are periodic functions of their atomic numbers and not atomic weights.
In Modern Periodic Table the number of columns and periods are respectively _______ and _______.
State modern periodic law.
The basis of modern periodic law is ______.
| Group in the modern periodic table | Families |
| 1 | ______ |
| ______ | Transition metals |
| ______ | Boron family |
| 15 | ______ |
| 17 | ______ |
