Advertisements
Advertisements
प्रश्न
Show diagrammatically the electron distributions in a sodium atom and a sodium ion and also give their atomic number.
Advertisements
उत्तर
11Na -2,8,1 (11 electrons)
Na – 1e–—> Na+ (10 electrons) Electronic configuration 2, 8.
The atomic number of an element is equal to the number of protons in its atom. Since, sodium atom and sodium ion contain the same number of protons, therefore, the atomic number of both is 11.
APPEARS IN
संबंधित प्रश्न
Explain the Atomic number with example.
The composition of the nuclei of two atomic species X and Y are given as under
| X | Y | |
| Protons | 6 | 6 |
| Neutrons | 6 | 8 |
Give the mass numbers of X and Y. What is the relation between the two species?
Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
What is the significance of atomic numbers in the modern Periodic Table?
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?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
What are orbits or shells of an atom?
State the main postulates of Dalton’s atomic theory.
