Advertisements
Advertisements
Question
Right or wrong sentence.
The size of an atom depends on the number of valence electrons.
Options
Right
Wrong
Advertisements
Solution
The given sentence is wrong.
Explanation:
Atomic size is determined mainly by the principal quantum number (which shell the valence electrons occupy) and by effective nuclear charge and shielding, not simply the count of valence electrons. Atoms down a group get a new shell, so size increases, while across a period, added electrons stay in the same shell, but higher nuclear charge pulls them closer, so size decreases.
RELATED QUESTIONS
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 across the period left to right.
Why is the size of neon greater than fluorine?
Which is greater in size an atom or a cation?
Which is greater in size Fe2+ or Fe3+?
Size of atom progressively becomes smaller when we move from sodium (Na) to chlorine (CI) in the third period of the periodic table?
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
Among the elements of the second period, Li to Ne, pick out the element with the largest atomic size
What happens to the atomic size of elements on moving from left to right in a period?
The changes in the properties of elements on moving from left to right across a period of the Periodic Table. For the property, choose the correct answer.
The atomic size:
The size of an atom is indicated by its ______.
Right or wrong sentence.
Nanometer unit is used to measure atomic radius.
Right or wrong sentence.
Moving from left to right, the size of the atom decreases.
Write an explanation.
Atomic radius
Write information about the given atomic numbers in the table.
| Atomic Number | Electronic configuration | Group | Period | Element |
| 10 | ||||
| 20 | ||||
| 7 |
Carbon belongs to the second period and Group 14. Silicon belongs to the third period and Group 14. If the atomic number of carbon is 6, the atomic number of silicon is ______
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.
Which one of the following has the largest atomic radius?
