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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Give the Chemical Formula of Sodium Bicarbonate - Chemistry

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प्रश्न

Give the chemical formula of sodium bicarbonate

एक पंक्ति में उत्तर
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उत्तर

It denotes in a compound, the number of atoms of element present.

∴ Formula = \[\ce{NaHCO3}\]

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अध्याय 4: Atomic Structure - Exercise

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संबंधित प्रश्न

What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.


Give alongside is a part of the periodic table :
As we move horizontally from left to right:

Li Be   B C N O F
Na Mg   Al Si P S Cl


(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?


Give the symbol and valency of the following element and radical.

Zinc


State what is meant by the term chemical formula.


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.

  1. Which element has more metallic character from these two elements?
  2. What is the valency of each X and Y elements?
  3. Atom size of Y element is smaller than atom size of X element. Explain.

Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.

Periods Group 2 Group 17
2 ----- A
3 B -----
4 ----- C
  1. What is A element metal or nonmetal?
  2. Which is the outermost orbit of element B?
  3. Identify C element and it's physical state.

Which of the following is the outermost shell for elements of period 2?


______ group elements are called alkaline earth metals.


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 Noble gas?


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