Advertisements
Advertisements
प्रश्न
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Advertisements
उत्तर
| Particle | Charges | Mass |
| (1) proton | Positive | One atomic mass unit. (amu) |
| (2)electron | Negative | 1/1837 times the mass of one hydrogen atom. |
| (3)Neutron | No charge | One atomic mass unit, equal to mass of proton. |
APPEARS IN
संबंधित प्रश्न
Why is it not possible to see an atom with naked eyes?
Define: Chemical bond
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
Fill in the blank
An excess of electrons produces a ________ charge.
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
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.
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
Draw the electron dot structure of this compound.
Name the gas that.
Turns moist starch iodide paper blue black.
Draw the diagrams representing the atomic structures of the following: Neon
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
K: Potassium:: C: ______.
Name the sub-atomic particles.
Define the term ions or radicals.
The graphite refill used is pencil is made of element called ______.
The smallest unit of an element is ______.
The most abundant type of atom is the universe is ______.
The ______ are combination of atoms of various elements or the same element.
The first scientific theory about atoms was given by J J. Thomson.
