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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
What type of bond is formed between two atoms, when the electronegative difference between them is low ?
Fill in the blank.
___________ single covalent bonds are formed between the carbon and chlorine atoms.
Element X is a metal with a valency 2. Element Y is a non metal with a valency 3.
(a) Write equations to show how X and Y form ions.
(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a 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.
Name an element which does not contain neutron.
Give a reason
Physical properties of isotopes are different.
How do atoms attain noble gas configurations?
Give the orbital diagram of the following:
Methane
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 |
How many atoms of each kind are present in the following molecule:
water
