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प्रश्न
Define: Ions
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उत्तर
An atom which becomes charged by losing or gaining electrons is called an ion.
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संबंधित प्रश्न
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
Tick the most appropriate answer.
Who discovered that radioactive rays are given out by uranium?
- Henri Becquerel
- Marie Curie
- Pierre Curie
- Schmidt
WRITE SHORT ANSWER
Define an ionic compound.
Write the names of the elements present in the :-
Sulphuric acid
Write the names of the elements present in the:-
Glucose
Write the names of the elements present in the:-
Acetic acid
Name the particles which revolve around the nucleus.
Give two examples for each of ionic and covalent bond.
State Dalton’s atomic theory.
How is the size of an atom indicated ?
Is it possible to see atoms these days ? Explain your answer.
Select the correct answer to the statement given below:
The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
In the nucleus of `""_20"Ca"^40`, there are ______
You are provided with a fine white coloured powder which is either sugar or salt. How would you identify it without tasting?
The smallest unit of an element is ______.
The most abundant type of atom is the universe is ______.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
The ______ are combination of atoms of various elements or the same element.
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.
