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प्रश्न
Right or wrong sentence.
Moving from left to right, the size of the atom decreases.
पर्याय
Right
Wrong
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उत्तर
The given sentence is right.
Explanation:
If you mean “moving from left to right across a period of the periodic table”, the sentence is correct: atomic size (atomic radius) generally decreases because the nuclear charge increases while electrons are added to the same shell, so electrons are pulled in closer to the nucleus.
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संबंधित प्रश्न
Answer the following in respect of element `31/15 P `
Is it a reducing agent or oxidizing agent?
Give the trends in atomic size on moving down the group.
Why is the size of neon greater than fluorine?
Which is greater in size an atom or a cation?
Which is greater in size an atom or an anion?
Give reason for the following:
Argon atom is bigger than chlorine atom.
Arrange the following in order of increasing radii:
CI- , CI
Supply the missing word from those in the brackets:
If an element has seven electrons in its outermost shell then it is likely to have the ______ (largest/ smallest) atomic size among all the elements in the same period.
While going from top to bottom in a group the atomic radius ______.
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 among the following elements has the largest atomic radii?
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
Atomic number of a few elements are given below
10, 20, 7, 14
- Identify the elements
- Identify the Group number of these elements in the Periodic Table
- Identify the Periods of these elements in the Periodic Table
- What would be the electronic configuration for each of these elements?
- Determine the valency of these elements
- In below ladder symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table.
- Arrange them in the order of their group also.
- 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 in order of increasing radii:
Cl−, Cl
Explain your choice.
Arrange the following in order of increasing radii:
N, O, P
Explain your choice.
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?
