Advertisements
Advertisements
Question
Write the name and symbol of the element from the description.
The noble gas with the smallest atomic radius.
Advertisements
Solution
Name: Helium
Symbol: He
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?
Give the trends in atomic size on moving down the group.
Arrange the elements of second and third periods in increasing order of their atomic size (excluding noble gases).
Which is greater in size an atom or an anion?
Fill in the blank:
On moving across a period from right to left in the periodic table, the atomic size of the atom ___________.
Write the name and symbol of the element from the description.
The atom having the smallest atomic mass.
Study the radius of the element given below and answer the following questions.
| elements | K | Na | Rb | Cs | Li |
| Atomic radius (pm) | 231 | 186 | 244 | 262 | 151 |
a) Which of the above elements have the smallest atom?
b) In which group of the modern periodic table the above element are belongs?
c) What is the periodic trend observed in the variation of atomic radii down a group?
Fill in the blanks.
Size of the atoms ______ from left to right across a period and ______ on descending in a group of normal elements.
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:
Right or wrong sentence.
Moving from left to right, the size of the atom decreases.
Right or wrong sentence.
The size of an atom depends on the number of valence electrons.
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 among the following elements has the largest atomic radii?
Elements have been arranged in the following sequence on the basis of their increasing atomic masses.
| F, | Na, | Mg, | Al, | Si, | P, | S, | Cl, | Ar, | K |
- Pick two sets of elements which have similar properties.
- The given sequence represents which law of classification of 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.
Arrange the following in order of increasing radii:
Cl−, Cl
Explain your choice.
