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प्रश्न
The basic unit of matter is ______.
विकल्प
element
atom
molecule
electron
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उत्तर
The basic unit of matter is atom.
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संबंधित प्रश्न
Write the names of the elements present in the:-
Ammonia
Fill in the blank
An ion with negative charge is called _______
What does an atom consist of ? Explain.
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Name the particles which revolve around the nucleus.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Fill in the blank
A charged particle is called an _____
What is an atom ? How do atoms usually exist ?
One nm is equal to :
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of aluminium
The smallest particle of matter that can exist by itself is ______.
Define the following term with an example.
Element
Project.
To have an idea of what atoms are, students can be asked to construct atoms using pipe cleaners (thin metal wires-electron shells), pompoms (balls-different colours for protons and neutrons) and beads (electrons). Students will love and enjoy putting them together and they look great hanging from the ceiling in the classroom.
In all atoms of an element
The number of atoms present in a molecule is called its ______.
Write any two observations which support the fact that atoms are divisible.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
Lead is also known as plumbum.
The ______ are combination of atoms of various elements or the same element.
