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प्रश्न
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
पर्याय
True
False
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उत्तर
False
Correct statement: The basic unit of an element is atom.
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
Elements having a tendency to accept electrons are called metals
Write the names of the elements present in the following compound.
Common salt
Fill in the blank:
Atoms are _____
Name two particles found inside the nucleus. What are they collectively called ?
Give two examples for each of ionic and covalent bond.
State Dalton’s atomic theory.
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 ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
Write the relation between nanometre and metre.
State two observations which show that atom is not indivisible.
What is an atom ? How do atoms usually exist ?
What is the contribution of the following in atomic structure?
Maharshi Kanada
Define the following term with an example.
Non-metal
Define the term ions or radicals.
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Atoms of different elements having the same number of ______ are called isotones.
Give the salient features of “Modern atomic theory”.
The graphite refill used is pencil is made of element called ______.
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 ______.
