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
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
Write the names of the elements present in the:-
Glucose
Write the names of `("NH"_4)_2"SO"_4` compounds:
Define: Relative atomic mass
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Name the particles which revolve around the nucleus.
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
How is the size of an atom indicated ?
How many times is a proton heavier than an electron?
What is an atom ? How do atoms usually exist ?
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
Draw the diagrams representing the atomic structures of the following: Neon
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form negative ion?
Rewrite the given sentence in correct form.
Elements contain two or more kind of atoms and compounds contain only one kind of atom.
Define – Atom.
______ is the smallest particle of an element.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
The most abundant type of atom is the universe is ______.
