Advertisements
Advertisements
Question
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Advertisements
Solution
Dalton’s atomic theory states that atoms are indivisible. This statement is not valid as, atoms can be further divided into electrons, protons and neutrons. This is one of the major drawbacks of Dalton’s atomic theory of matter.
APPEARS IN
RELATED QUESTIONS
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Write the names of `"FeS"` compounds :
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
Define: An Atom:
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
Fill in the blank
A deficiency of electrons produces a ________ charge.
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.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Draw the electron dot structure of this compound.
Select the correct answer to the statement given below:
The basic unit of matter is not capable of independent existence.
In all atoms of an element
An element is composed of ______ atoms.
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
The most abundant type of atom is the universe is ______.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
What are the 3 most abundant atoms on the earth?
Atoms have a radius of the order ______.
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.
