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प्रश्न
State the number of elements in Period 3 of the Periodic Table.
उत्तर
Period 3 is a short period that has 8 elements.
संबंधित प्रश्न
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
Name two elements in Alkaline earth metals.
State what is meant by the term chemical formula.
Give the chemical formula of magnesium nitrate
Which of the following statements about the Modern periodic table is correct?
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Which of the element is a Metalloid?
Name two elements that you would expect to show chemical reactions similar to calcium. What is the basis of your choice?
Give reason for the following:
Inert gases do not form ion.
