Advertisements
Advertisements
प्रश्न
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]
Advertisements
उत्तर
Phosphorus – \[\ce{^31_15P}\]
Atomic number Z = p = e = 15
Mass number A = p + n
31 = 15 + n
∴ n = 31 − 15 = 16
P
15 = 2, 8, 5
(K, L, M)
APPEARS IN
संबंधित प्रश्न
Explain the Atomic number with example.
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What is its atomic number and mass number?
Tick the most appropriate answer.
Which of these have similar chemical properties but different set of physical properties and mass number?
- isobars
- elements
- isotopes
- none of these
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.
What is meant by the 'atomic number of an element'?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with 6 valence electrons
The diagram represents an isotope of hydrogen [H]. Answer the following:

Atomic no. = 1
Mass no. = 1
Do isotopes have the same atomic number or the same mass number?
Differentiate mass number from atomic number.
The atomic number and the mass number of an element is 26 and 56 respectively. Calculate the number of electrons, protons and neutrons in its atom. Draw the structure.
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.
