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प्रश्न
Write the name and symbol of the element from the description.
The atom having the smallest size.
Write the name of the atom having the smallest size.
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उत्तर
Helium (He)
संबंधित प्रश्न
Answer the following in respect of element `31/15 P `
Give its formula with chlorine?
Which is greater in size an atom or a cation?
Size of atom progressively becomes smaller when we move from sodium (Na) to chlorine (CI) in the third period of the periodic table?
Give reasons for the following:
The size of the anion is greater than the size of the parent atom.
Give reason for the following:
Argon atom is bigger than chlorine atom.
Give scientific reasons for the following:
Atomic radius goes on decreasing while going from left to right in a period.
Fill in the blanks.
Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
Arrange the following in increasing order of property indicated
I, I+, I- (atomic size)
With reference to the variation of properties in the Periodic Table, which of the following is generally true?
Atomic size increases from left to right across a period.
Atomic radius is expressed in the unit _______.
Write scientific reason.
In same period, boron and oxygen elements have different atomic size.
Some elements and their atomic radii are given here. Arrange them in decreasing order of their atomic radii. Identify which of the above elements is the biggest atom and which is smallest?
| Element | K | Na | Rb | Cs | Li |
| Atomic radius (pm) | 231 | 186 | 244 | 262 | 151 |
Write information about the given atomic numbers in the table. 10, 20, 7.
| Atomic Number | Electronic configuration | Group | Period | Element |
| 10 | ||||
| 20 | ||||
| 7 |
Which of the following is the correct order of atomic size?
Which of the following gives the correct increasing order of the atomic radii of O, F and N?
Which of the following are the characteristics of isotopes of an element?
- Isotopes of an element have same atomic masses
- Isotopes of an element have same atomic number
- Isotopes of an element show same physical properties
- Isotopes of an element show same chemical properties
Arrange the following elements in increasing order of their atomic radii.
- Li, Be, F, N
- Cl, At, Br I
Arrange the following as per instruction given in the bracket.
Mg, Cl, Na, S, Si (decreasing order of atomic size)
Arrange the following in order of increasing radii:
Cl−, Cl
Explain your choice.
