Advertisements
Advertisements
Question
Give brief information of three subatomic particles with reference to electrical charge, mass and location.
Advertisements
Solution
- Electron
- Electrons are present outside the nucleus of an atom.
- Electrons are negatively charged that is (−1.6 × 10-19 coulomb).
- The mass of an electron is considered to be negligible. It is 1800 times less than that of a hydrogen
- The mass of an electron is 1800 times less than that of a hydrogen atom
- It revolves around the nucleus in the discrete orbit.
- Proton:
- Protons are present inside the nucleus of an atom.
- Protons are positively charged that is (1e = 1.6 × 10−19 coulomb).
- The mass of a proton is approximately 1 u (1 Dalton); that is, 1 u = 1.66 × 10−27 kg).
- When the total positive charge on the nucleus is expressed in the unit ‘e’, its magnitude is equal to the number of protons in the nucleus. The mass of one proton is approximately 1 u (1 Dalton).
- Neutron:
- Neutrons are present inside the nucleus of an atom.
- Neutrons are neutral. There is no charge.
- The mass of a neutron is nearly equal to the mass of a proton that is 1 u(1 Dalton) that is (1 u = 1.66 × 10−27 kg).
- The mass of a neutron is approximately lu, which is almost equal to that of a proton.
RELATED QUESTIONS
Why is it not possible to see an atom with naked eyes?
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
How are isobars different from isotopes ?
Write the names of the elements present in the following compound.
Common salt
Write the names of the elements present in the :-
Sulphuric acid
Name the three subatomic particles present in an atom.
What value has been given to the mass of this reference atom ?
An atom of element E contains 3 protons, 3 electrons and 4 neutrons :
(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Find the mass of 2 moles of nitrogen atoms.
Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.
Define the following term:
Atom
Electron, proton, neutron are the types of ______ in an atom.
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
What is the contribution of the following in atomic structure?
Maharshi Kanada
In what respects do the three isotopes of hydrogen differ? Give their structures.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Atoms of different elements having the same number of ______ are called isotones.
The ______ are combination of atoms of various elements or the same element.
