Question

Which of the following is lightest?
2) lg atom of mercury
1) Ig of mercury (Hg=200u)
3) 1 atom of mercury
4) 1 mol of mercury

Answer 1

Answer:

The lightest among the following is option $3.\ 1$ atom of mercury·

Explanation:

To find out the lightest one, we need to find which one has the lowest mass among the options given·

For that, let's evaluate the mass of Hg in each case·

$1)$ $1g$ of mercury $:$ Here it is directly given the mass of Hg as $1g.$

$2)$ $1g$ atom of mercury $:$ $1g$ atom of mercury is the same as the atomic weight of mercury which is equal to $200g.$

  So here, the mass of mercury is $200g.$

$3)\ 1$ atom of mercury $:$ Here mercury contain $1$ atom as its particle·

 ∴  No· of moles of Hg $=\ \frac{No. \ of\ particles}{Avogadro\ number}$

⇒                                $=\ \frac{1}{6.022\ *\ 10^{-23} }$

⇒   mass of Hg $=\ No.\ of\ moles\ *\ Molar\ mass\ of\ Hg$

⇒                      $=\ ( \frac{1}{6.022\ *\ 10^{-23} } )\ *\ 200$

⇒                      $=\ 3.32\ *\ 10^{-22}g$ of Hg

So here the mass of mercury is  $3.32\ *\ 10^{-22}g$·

$4)\ 1$ mol of mercury $:$ $1$ mol of mercury is same as $200g$ of mercury which is its atomic weight·

 So here the mass of mercury is $200g.$

On comparing the mass of mercury in each case the lowest mass is in $1$ atom of mercury which is the lightest among these·

Answer 2

The lightest atom $1$g atom of mercury

Explanation:

• A toxic metallic chemical element that is heavy, silvery-white, and liquid at ordinary temperatures.
• A mercury column in a thermometer or barometer.
• capitalized the planet closest to the sun, with a diameter of around.  
• Iron and silica rocks make up mercury. The planet's core contains more iron than any other in our solar system.
• Our solar system is full of mysteries. The eight planets revolving around the sun are all very unique, yet still connected at a certain level.