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प्रश्न
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is
विकल्प
17
11
18
20
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उत्तर
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is 17.
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संबंधित प्रश्न
Define a chemical bond.
Match the atomic number 4, 8, 14, 15 and 19 with each of the following:
(a) A solid non-metal of valelncy 3.
(b) A gas of valency 2.
(c) A metal of valency 1.
(d) A non-metal of valency 4
Separate the following compounds into three categories - ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.
Among the following compounds identify the compound that has all three bonds (ionic, covalent and coordinate bond).
Compare :
Sodium atom and sodium ion
Element M forms a chloride with the formula MCl2 which is solid with a high melting point. What type of bond is in MCl2. Write the formula of the compound when M combines with sulphur, oxygen, and nitrogen.
Identify the following reaction as either oxidation or reduction:
K - e- → K+
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 |
Elements with stable electronic configurations have eight electrons in their valence shell. They are ______.
The element that would form cation due to the loss of electrons during the chemical reaction is ______.
