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Question
Name two particles found inside the nucleus. What are they collectively called ?
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Solution
Protons and Neutrons. Mass number.
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RELATED QUESTIONS
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MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
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| 6. Nuclear fusion | f. Generator of electricity |
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| h.Energy in sun |
TRUE \ FALSE
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ANSWER IN DETAIL
State the postulates of the Dalton’s atomic theory.
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Define:- Radicals
Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
How did Neils Bohr visualise the atom ?
Fill in the following blanks with suitable words :
In water, the proportion of oxygen and hydrogen is .............. by mass.
State two observations which show that atom is not indivisible.
Draw the electron dot structure of this compound.
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
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The smallest particle of a substance – capable of independent existence and which retains the characteristics of the substance.
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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
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- Rutherford’s atomic model
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- Bohr’s atomic model
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What are the 3 most abundant atoms on the earth?
