Advertisements
Advertisements
Questions
Write a scientific reason.
Atomic radius goes on increasing down a group.
Give scientific reasons:
Atomic radius goes on increasing down the ‘group’.
Advertisements
Solution
- Atomic radius increases as we move from top to bottom in a group because a new shell of electrons is added to the atoms at every step.
- The number of electron shells increases gradually, due to which the size of the atoms increases.
- As the size of the atoms increases, it leads to an increase in the atomic radius.
- The distance between the nucleus and the outermost electrons increases, so the attractive force of the nucleus decreases.
APPEARS IN
RELATED QUESTIONS
Answer the following in respect of element `31/15 P`
Give its electronic configuration
Why is the size of sodium is greater than magnesium?
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
Give scientific reasons for the following:
Atomic radius goes on decreasing while going from left to right in a period.
Select the correct answer
Atomic radii of fluorine and neon in angstrom unit are
What happens to the atomic size of elements on moving from left to right in a period?
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.
On moving from left to right in a periodic table, the size of the atom ______.
_______ is the distance between the nucleus of the atom and its outermost shell.
Right or wrong sentence.
Nanometer unit is used to measure atomic radius.
Which of the following is the correct order of atomic size?
When an atom of iodine becomes an iodine ion (I–) the radius will ______
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
- Electropositive nature of the element(s) increases down the group and decreases across the period
- Electronegativity of the element decreases down the group and increases across the period
- Atomic size increases down the group and decreases across a period (left to right)
- Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.
- Name the most electropositive element among them
- Name the most electronegative element
- Name the element with smallest atomic size
- Name the element which is a metalloid
- Name the element which shows maximum valency.
Arrange the following as per instruction given in the bracket.
Mg, Cl, Na, S, Si (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 of the following has the largest atomic radius?
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?
