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प्रश्न
Write the names of the elements present in the:-
Sodium hydroxide
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उत्तर
Sodium hydroxide : Sodium, oxygen, hydrogen.
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 |
ANSWER IN DETAIL
How are isobars different from isotopes ?
Fill in the blank
An ion with positive charge is called ______
State Dalton’s atomic theory.
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
How is the size of an atom indicated ?
What value has been given to the mass of this reference atom ?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell of the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
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.
What will be the charge present of the molecule XY after chemical combination?
The smaller particles found in the atom is called ______.
Define the term ions or radicals.
Atoms of different elements having ______ mass numbers, but ______ atomic numbers are called isobars.
Dalton’s atomic theory successfully explained
(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
Write any two observations which support the fact that atoms are divisible.
The most abundant type of atom is the universe is ______.
What are the 3 most abundant atoms on the earth?
Atoms have a radius of the order ______.
