Advertisements
Advertisements
प्रश्न
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element which can form trivalent ion
उत्तर
Atomic number 15
Electronic configuration (15): 2,8,5
APPEARS IN
संबंधित प्रश्न
Complete the following table.
| Atomic number | Mass number | Number of Neutrons | Number of protons | Number of electrons | Name of the Atomic species |
| 9 | - | 10 | - | - | - |
| 16 | 32 | - | - | - | Sulphur |
| - | 24 | - | 12 | - | - |
| - | 2 | - | 1 | - | - |
| - | 1 | 0 | 1 | 0 | - |
Write true or false for the following statement
An atom on the whole has a positive charge.
Sulphur has an atomic number 16 and a mass of 32.
State the number of protons and neutrons in the nucleus of sulphur. Give a simple diagram to show the arrangement of electrons in an atom of sulphur.
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Phosphorus – \[\ce{^31_15P}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Lithium [At. no. = 3, Mass no. = 7]
Name the 3 sub-atomic particles of an atom.
The Atomic number of an element is 20. It has ______ valence electrons.
Mass No. 27 is for the element ______.
Electrons revolve around the nucleus in definite open shells.
