Advertisements
Advertisements
प्रश्न
Why is it not possible to see an atom with naked eyes?
उत्तर
The size of an atom is so small that it is not possible to see it with the naked eye. Also, an element's atom does not exist independently (its atomic radius is of the order of 10-10 m).
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
Define:- Radicals
Write the names of the elements present in the:-
Sodium hydroxide
Write the names of `"Na"_3"PO"_4` compounds :
Define: Mass number
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
Fill in the blank
An excess of electrons produces a ________ charge.
Write the relation between nanometre and metre.
Find the mass of 2 moles of nitrogen atoms.
Draw the diagrams representing the atomic structures of the following: Neon
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
An element is composed of ______ atoms.
Define the term ions or radicals.
1 mole of Gold and Silver contain same number of atoms.
A change in the physical state can be brought about
The smallest unit of an element is ______.
The most abundant type of atom is the universe is ______.
Atoms have a radius of the order ______.