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प्रश्न
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
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उत्तर
Atomic number 19
Electronic configuration (19): 2,8,8,1
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संबंधित प्रश्न
What are the atomic numbers of elements whose outermost electrons is represented by 3s1.
(a) Which of the nuclear particles is present in the same fixed number in the atoms of any particular element?
(b) What do we call this number which is characteristic of a particular element?
The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement?
An atom of an element has two electrons in the M shell.
What is the (a) atomic number (b) number of protons in this element?
What are orbits or shells of an atom?
State the main postulates of Dalton’s atomic theory.
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Are isotopes atoms of the same element or different elements.
What is atomic number?
Match the following:
| Column A | Column B | ||
| 1. | K shell | a. | 8 |
| 2. | L shell | b. | 32 |
| 3. | M shell | c. | 2 |
| 4. | N shell | d. | 18 |
State the term for the following:
The amount of substance which contains the same number of units as the number of atoms in carbon-12.
