Advertisements
Advertisements
Question
On moving from left to right in a periodic table, the size of the atom ______.
Options
increases
decreases
decreases first and then increases
does not change
Advertisements
Solution
On moving from left to right in a periodic table, the size of the atom decreases.
Explanation:
When moving from left to right across a period in the periodic table, the atomic size decreases. This happens because the number of protons in the nucleus increases, which increases the nuclear charge. This stronger positive charge pulls the valence electrons closer to the nucleus, effectively shrinking the atom’s radius.
APPEARS IN
RELATED QUESTIONS
Answer the following in respect of element `31/15 P`
Give its electronic configuration
Answer the following in respect of element `31/15 P `
Is it a reducing agent or oxidizing agent?
Which is greater in size an atom or an anion?
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
Fill in the blanks.
Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
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.
Fill in the blank by selecting the correct word from the bracket.
If an element has seven electrons in its outermost shell then it is likely to have the _____ atomic size among all the elements in the same period.
_______ is the distance between the nucleus of the atom and its outermost shell.
Atomic radius is expressed in the unit ______.
Right or wrong sentence.
Nanometer unit is used to measure atomic radius.
Right or wrong sentence.
The size of an atom depends on the number of valence electrons.
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 ______
Which of the following is the correct order of size?
Which among the following elements has the largest atomic radii?
Which one of the following depict the correct representation of atomic radius(r) of an atom?
|
(i) |
(ii) |
|
(iii) |
(iv) |
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?
An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a divalent halide.
- Where in the periodic table are elements X and Y placed?
- Classify X and Y as metal (s), non-metal (s) or metalloid (s)
- What will be the nature of oxide of element Y? Identify the nature of bonding in the compound formed
- Draw the electron dot structure of the divalent halide
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?
