Home
Class 12
CHEMISTRY
The last member of group 18 is:...

The last member of group 18 is:

A

Helium

B

Neon

C

Argon

D

Radon

Text Solution

AI Generated Solution

The correct Answer is:
To determine the last member of Group 18 (the noble gases), we can follow these steps: ### Step 1: Identify the Group 18 Elements Group 18 of the periodic table consists of the following elements: - Helium (He) - Neon (Ne) - Argon (Ar) - Krypton (Kr) - Xenon (Xe) - Radon (Rn) ### Step 2: Understand the Characteristics of Group 18 Elements Group 18 elements are known as noble gases. They have a complete valence shell, which makes them very stable and largely unreactive with other elements. ### Step 3: Determine the Order of Elements in Group 18 The elements in Group 18 are arranged in order of increasing atomic number: 1. Helium (He) - Atomic number 2 2. Neon (Ne) - Atomic number 10 3. Argon (Ar) - Atomic number 18 4. Krypton (Kr) - Atomic number 36 5. Xenon (Xe) - Atomic number 54 6. Radon (Rn) - Atomic number 86 ### Step 4: Identify the Last Member From the list, we can see that Radon (Rn) is the element with the highest atomic number in Group 18, making it the last member of this group. ### Conclusion The last member of Group 18 is Radon (Rn), which has an atomic number of 86. ### Final Answer **Radon (Rn)** ---
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • P-BLOCK ELEMENTS (HALOGEN & NOBLE GASES)

    RESONANCE ENGLISH|Exercise EXERCISE-2 PART-1|16 Videos

  • P-BLOCK ELEMENTS (HALOGEN & NOBLE GASES)

    RESONANCE ENGLISH|Exercise EXERCISE-2 PART-2|15 Videos

  • P-BLOCK ELEMENTS (HALOGEN & NOBLE GASES)

    RESONANCE ENGLISH|Exercise EXERCISE-1 PART-2|41 Videos

  • P-BLOCK ELEMENT (BORON AND CARBON FAMILY)

    RESONANCE ENGLISH|Exercise PART - III : OLYMPIAD PROBLEMS (PREVIOUS YEARS) STAGE - V (INTERNATIONAL CHEMISTRY OLYMPIAD (IChO)) Problem 3|8 Videos

  • PERIODIC TABLE & PERIODICITY

    RESONANCE ENGLISH|Exercise Advanced Level Problems|105 Videos

Similar Questions

Explore conceptually related problems

Fluorine, the first member of group 17, differs form the other members of group in may respects due to: i. Very small size ii. Very high electronegativity iii. Absence of vacant d-orbitals in the valence shell iv. Dissociation energy in the molecular form (X_(2)) is the least Which of the following do not exist ?

Fluorine, the first member of group 17, differs form the other members of group in may respects due to: i. Very small size ii. Very high electronegativity iii. Absence of vacant d-orbitals in the valence shell iv. Dissociation energy in the molecular form (X_(2)) is the least The most basic among the following is:

Fluorine, the first member of group 17, differs form the other members of group in may respects due to: i. Very small size ii. Very high electronegativity iii. Absence of vacant d-orbitals in the valence shell iv. Dissociation energy in the molecular form (X_(2)) is the least Which of the following bonds is the stronger ?

Fluorine, the first member of group 17, differs form the other members of group in may respects due to: i. Very small size ii. Very high electronegativity iii. Absence of vacant d-orbitals in the valence shell iv. Dissociation energy in the molecular form (X_(2)) is the least Which member of the group 17 does not show positive oxidation state ?

The last member of 4n+1 series is an isotope of …………………………………. .

Complete the following crossword puzzle (Figure) Across (1) An element with atomic number 12 (3) Metal used in making cans and member of group 14 (4) A lustrous non-metal which has 7 electrons in its outermost shell Down (2) Highly reactive and soft metal which imparts yellow colour when subjected to flame and is kept in kerosene (5) The first element of second period (6) An element whihc is used in making flurescent bulbs and is second member of group 18 in the modern periodic table (7) A radioactive element which is the last member of halogen family (8) Metal which is an important constituent of steel and forms rust when exposed to moist air (9) The first metalloid in modern periodic table whose fibres are used in making bullet-proof vests

Explain the following : Only higher members of group 18 of the periodic table are expected to form compounds.

A group of elements in the Periodic Table are given pelow (Boron is the first member of the group and Thallium is the last). Boron Aluminium Gallium Indium Thallium Answer the following questions in relation to the above group of elements : Will the elements in the group to the right of this Boron group be more metallic or less metallic in character ? Justify your answer.

A group of elements in the Periodic Table are given pelow (Boron is the first member of the group and Thallium is the last). Boron Aluminium Gallium Indium Thallium Answer the following questions in relation to the above group of elements : The atomic number of Boron is 5. Write the chemical formula of the compound formed when Boron reacts with Chlorine.

A group of elements in the Periodic Table are given pelow (Boron is the first member of the group and Thallium is the last). Boron Aluminium Gallium Indium Thallium Answer the following questions in relation to the above group of elements : Which element would be expected to have the highest electronegativity ?

Home
Profile