Advertisements
Advertisements
Question
Write the relation between nanometre and metre.
Advertisements
Solution
1 nanometre = 1/109 metre
or
1 nanometre = 10–9 metre
APPEARS IN
RELATED QUESTIONS
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
WRITE SHORT ANSWER
Name three inert gases.
How did Neils Bohr visualise the atom ?
Name the particle or particles you would expect to find in :
The orbit of an atom
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
Does the particle have an excess of electrons or a deficiency of electrons ?
How many times is a proton heavier than an electron?
Which of the following statement is correct about the atom of an element ?
How many atoms are there in exactly 12 g of carbon-12 element ? (C = 12 u)
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Draw the diagrams representing the atomic structures of the following: Neon
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
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.
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
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 ______.
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
