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प्रश्न
Write the names of the elements present in the:-
Glucose
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उत्तर
Glucose : Carbon, hydrogen, oxygen.
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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 |
Write the names of the elements present in the:-
Ammonia
What does the word ‘atom’ mean?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the atomic numebr of X ?
Fill in the blank
An excess of electrons produces a ________ charge.
Fill in the blank
A deficiency of electrons produces a ________ charge.
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
What is an atom ? How do atoms usually exist ?
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Define the following term:
Atom
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
The smallest particle of matter that can exist by itself is ______.
A compound containing one atom of carbon and two atoms of oxygen is ______.
State true or false. If false, correct the statement.
The basic unit of an element is molecule.
K: Potassium:: C: ______.
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
- Rutherford’s atomic model
- Thomson’s atomic model
- Bohr’s atomic model
The graphite refill used is pencil is made of element called ______.
The smallest unit of an element is ______.
What are the 3 most abundant atoms on the earth?
