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प्रश्न
Fill in the blank
An ion with negative charge is called _______
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उत्तर
An ion with negative charge is called anion.
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संबंधित प्रश्न
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Write the names of the elements present in the:-
Acetic acid
Fill in the blank
An ion with positive charge is called ______
Define: Ions
Name the particles which revolve around the nucleus.
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X?
Fill in the blank
A charged particle is called an _____
Fill in the blank
An _______ is electrically neutral.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Which of the following statement is correct about the atom of an element ?
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Define the following term with an example.
Metal
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
Lead is also known as plumbum.
What are the 3 most abundant atoms on the earth?
Atoms have a radius of the order ______.
