Advertisements
Advertisements
Question
Why is it not possible to see an atom with naked eyes?
Advertisements
Solution
The size of an atom is so small that it is not possible to see it with the naked eye. Also, an element's atom does not exist independently (its atomic radius is of the order of 10-10 m).
APPEARS IN
RELATED QUESTIONS
WRITE SHORT ANSWER
Define an ionic compound.
Write the names of the elements present in the:-
Acetic acid
Fill in the blank
An ion with negative charge is called _______
Define: Covalent bond
Fill in the blank
A deficiency of electrons produces a ________ charge.
Write the full form of IUPAC.
Name the three subatomic particles present in an atom.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
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.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
The smallest particle of matter that can exist by itself is ______.
Define the following term with an example.
Compound
Does the solubility of a substance change with temperature? Explain with the help of an example.
Write any two observations which support the fact that atoms are divisible.
What is the fundamental particle of an 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 ______.
