Advertisements
Advertisements
प्रश्न
Write the names of the elements present in the:-
Acetic acid
Advertisements
उत्तर
Acetic acid : Carbon, hydrogen, oxygen.
APPEARS IN
संबंधित प्रश्न
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
What is radioactivity?
ANSWER IN DETAIL
How are isobars different from isotopes ?
Define:- Radicals
Fill in the blank
An ion with negative charge is called _______
Give two examples for each of ionic and covalent bond.
Who originated the word ‘atom’ ?
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
Why is it not possible to see an atom even with the most powerful microscope ?
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Draw the electron dot structure of this compound.
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 negative ion?
Define – Atom.
Define the following term with an example.
Metal
Does the solubility of a substance change with temperature? Explain with the help of an example.
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 ______.
