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प्रश्न
Compare :
Sodium atom and sodium ion
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उत्तर
|
Sodium atom |
Sodium-ion |
|
Sodium atom is electrically neutral. |
Sodium-ion is positively charged. |
|
In sodium atom, there are 11 protons and 11 electrons, i.e. an equal number of protons and electrons. |
In sodium-ion, there are 11 protons but 10 electrons, i.e. sodium ion contains a lesser number of electrons. |
|
The sodium atom has only one electron in its valence shell. |
Sodium-ion has 8 electrons in its valence shell. |
|
The size of a sodium atom is larger than a sodium ion. |
The size of a sodium ion is smaller than a sodium atom. |
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संबंधित प्रश्न
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Sodium chloride is ______ compound while hydrogen chloride is ______ compound.
Element X is a metal with a valency 2; Y is a non-metal with a valency 3.
(a) Write an equation to show how Y forms as ion
(b) If Y is a diatomic gas, write an equation for the direct combination of X and Y to form a compound.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2, 8, 1 |
2, 8, 7 |
2, 5 |
1 |
Answer the following question based on the table above:
What is the formula of the compound formed between W and X.
Explain fractional atomic mass. What is the fractional mass of chlorine?
What do you understand by redox reactions?
Copy and complete the following table relating to the atomic structure of some elements:
| Element | Atomic Number | Mass Number | Number of protons | Number of Neutrons | Number of Electrons |
| Beryllium | 4 | 9 | |||
| Fluorine | 9 | 10 | |||
| Sodium | 12 | 11 | |||
| Aluminium | 27 | 13 | |||
| Phosphorus | 31 | 15 |
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^23_11Na}\]
Complete the table give below.
| Element |
Atomic number |
Electron distribution | Valence electrons | Lewis dot structure |
| Lithium | 3 | 1s22s1 | ||
| Boron | 5 | 1s22s22p1 | ||
| Oxygen | 8 | 1s22s22p4 |
An atom X with atomic number 20 combines with atom Y with atomic number 8. Draw the dot structure for the formation of the molecule XY.
Spot the error/correct the wrong statement:
In the formation of compounds, the inner shell electrons of an atom involved in bonding.
