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Question
Write the names of `"FeS"` compounds :
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Solution
`"FeS"` - Iron sulphide
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If bromine atom is available in the form of, say, two isotopes `""_35^79Br (49.7%)" and """_35^81Br (50.3%)`, calculate the average atomic mass of bromine atom.
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 |
WRITE SHORT ANSWER
What is radioactivity?
ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
Define:- Atom
Write the names of the elements present in the :-
Sulphuric acid
Write the names of the elements present in the:-
Acetic acid
Fill in the blank:
Atoms are _____
Name the particles which revolve around the nucleus.
What does the word ‘atom’ mean?
State Dalton’s atomic theory.
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
Why is it not possible to see an atom even with the most powerful microscope ?
One nm is equal to :
Which of the following statement is correct about the atom of an element ?
Define the following term:
Atom
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Atoms have a radius of the order ______.
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 ______.
