Advertisements
Advertisements
प्रश्न
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element which can form trivalent ion
Advertisements
उत्तर
Atomic number 15
Electronic configuration (15): 2,8,5
APPEARS IN
संबंधित प्रश्न
FILL IN THE BLANK
Atomic theory of matter was given by ..........................
An element has an atomic number 12. How many electrons will be present in the K, L and M energy shells of its atom?
What is the significance of atomic numbers in the modern Periodic Table?
Name or state the following:
Elements having same mass number but different atomic number
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Silicon [At. no. = 14, Mass no. = 28]
What is common salt? Name the elements present in it. Write the formula of common salt. What are the atomic number and the mass number of the elements? Write the ions in the compound.
The ratio of the radii of hydrogen atom and its nucleus is ~ 105. Assuming the atom and the nucleus to be spherical,
- what will be the ratio of their sizes?
- If atom is represented by planet earth ‘Re ’ = 6.4 ×106 m, estimate the size of the nucleus.
If an atom has 6 electrons in its outermost shell, it is inert.
Element ‘P' has electronic configuration 2,8,8,1. The number of chlorine atoms present in the chloride of ‘P’ is ______.
An element has 2 electrons in its N shell.
What is its atomic number?
