Advertisements
Advertisements
प्रश्न
Name or state the following:
Elements having same mass number but different atomic number
Advertisements
उत्तर
4018Ar and 4020Ca
APPEARS IN
संबंधित प्रश्न
Name the particles which actually determine the mass of an atom.
An element has an atomic number 12. How many electrons will be present in the K, L and M energy shells of its atom?
The atomic number of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is :
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element which can form trivalent ion
Define the term of atomic number.
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
Elements X, Y, Z have atomic numbers 6, 9 and 12 respectively. Which one:
- forms anion – negative ion;
- forms cation – positive ion;
- has 4 electrons in the outermost orbit. [Y, Z, X]
An element ‘A’ has mass number 23 and atomic number 11. State the –
- no. of neutrons in its shell,
- electronic configuration of the element ‘A’.
What is mass number of an atom?
Compare the charge and mass of protons and electrons.
