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प्रश्न
Name two elements in halogens.
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उत्तर
Chlorine and bromine.
संबंधित प्रश्न
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
Would you place the two isotopes of chlorine, CI-35 and CI-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.
The atomic numbers of four elements P, Q, R and S are 6, 8, 14 and 16 respectively. Out of these, the element known as metalloid is:
(a) P
(b) Q
(c) R
(d) S
State its position in the periodic table?
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
An element barium has the atomic number 56. Look up its position in the periodic table and answer the following question.
Is it larger or smaller than caesium (Cs)?
Write a short note.
Structure of the modern periodic table.
What are the elements.
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
