Advertisements
Advertisements
Questions
Give scientific reasons for the following:
Atomic radius goes on decreasing while going from left to right in a period.
Give scientific reasons:
While going from left to right within a period, the size of the atom decreases.
Advertisements
Solution
- While going from left to right within a period, the atomic number increases one by one, meaning the positive charge on the nucleus increases by one unit at a time.
- However, the additional electron gets added to the same outermost shell. Due to the increased nuclear charge, the electrons are pulled towards the nucleus to a greater extent, and thereby the size of the atom decreases.
APPEARS IN
RELATED QUESTIONS
Answer the following in respect of element `31/15 P `
Is it a reducing agent or oxidizing agent?
Answer the following in respect of element `31/15 P `
Give its formula with chlorine?
Why is the size of neon greater than fluorine?
Which is greater in size Fe2+ or Fe3+?
Give reason for the following:
Argon atom is bigger than chlorine atom.
Fill in the blanks.
Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
On moving from left to right in a periodic table, the size of the atom _______.
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 |
Which of the following is the correct order of atomic size?
Which of the following is the correct order of size?
Which of the following gives the correct increasing order of the atomic radii of O, F and N?
Arrange the following elements in increasing order of their atomic radii.
- Li, Be, F, N
- Cl, At, Br I
Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?
The diagram below shows part of the periodic table.
- Which elements would react together to form covalent compounds?
- Between the two elements W and Z, which will have a bigger atomic radius? Why?
Arrange the following as per the instruction given in the bracket:
Carbon, Fluorine, Beryllium (decreasing order of atomic size).
In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:
The element A would have ______ atomic size than B.
Which one has the largest size?
Give reason for the following:
The size of a Cl− ion is greater than the size of a Cl atom.
This question refers to the elements of the Periodic Table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| A | B | C | D | E | F | G | H |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| I | J | K | L | M | N | O | P |
Which of these have least atomic size in period 3?
