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Question
The electron shell ______ is nearest to the nucleus.
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Solution
The electron shell K is nearest to the nucleus.
RELATED QUESTIONS
The average atomic mass of a sample of an element X is 16.2 u. What are the percentages of isotopes `""_8^16X" and """_8^18X` in the sample?
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:-
Sodium hydroxide
Name the particles which revolve around the nucleus.
Name three non-metals/radicals which have valency -1, -2, and -3.
Who originated the word ‘atom’ ?
An atom has 13 protons and 14 neutrons.
What is the atomic mass of the atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
Fill in the blank
A charged particle is called an _____
Is it possible to see atoms these days ? Explain your answer.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will gain electron?
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
Define the following term with an example.
Element
Draw the structure of an atom and explain the position of the sub-atomic particles.
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
An atom of Oxygen (O) and two atoms of hydrogen (H.) combine to form a molecule of ______.
The ______ are combination of atoms of various elements or the same element.
