Advertisements
Advertisements
Question
What are the two main features of Rutherford’s atomic model?
Advertisements
Solution
According to Rutherford’s model an atom consists of:
- The centrally located nucleus: The nucleus is a centrally located positively charged mass. The entire mass of the atom is concentrated in it. It is the densest part of the atom. Its size is very small as compare to the atom as a whole.
- The outer circular orbits: Electrons revolve in circular orbits (shell) in the space available around the nucleus. An atom is electrically neutral i.e., number of protons and electrons present in an atom are equal.
APPEARS IN
RELATED QUESTIONS
Explain the Atomic number with example.
Dalton said that ______ could not be divided.
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
From the symbol `""_15^31"P"`, state :
(i) mass number of phosphorus,
(ii) atomic number of phosphorus, and
(iii) electron configuration of phosphorus.
If an atom ‘A’ has mass number 35 and atomic number 17, state the number of protons, electrons and neutrons it contains.
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?
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
Differentiate between the following term:
Atomic number and mass number
The No. of electrons in the outermost shell of the atom of an inert gas ______.
‘A’ is denoted by ______.
