Advertisements
Advertisements
प्रश्न
Define: An Atom:
Advertisements
उत्तर
An Atom: Smallest particle of an element that can exist and have properties of an element.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Elements combine in definite proportions to form compounds.
Define:- Molecule
Write the names of the elements present in the:-
Sodium hydroxide
Fill in the blank
An ion with positive charge is called ______
Fill in the blank
An ion with negative charge is called _______
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Name the particle or particles you would expect to find in :
The orbit of an atom
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
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
An excess of electrons produces a ________ charge.
Write the full form of IUPAC.
What are the building blocks of matter ?
Is it possible to see atoms these days ? Explain your answer.
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.
Calculate the number of moles in 12.044 × 1025 atoms of phosphorus.
Name the gas that.
Turns moist starch iodide paper blue black.
The smallest particle of matter that can exist by itself is ______.
Define the following term with an example.
Non-metal
Give the salient features of “Modern atomic theory”.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
