Silver-plated utensils were popular before stainless steel became widely used to make eating utensils. silver tarnishes when it comes in contact with hydrogen sulfide, h2s, which is found in the air and in some foods. however, stainless steel does not tarnish when it
comes in contact with hydrogen sulfide.
76 in the space in your answer booklet, draw a lewis electron-dot diagram for the compound that tarnishes silver. [1]
77 in the ground state, an atom of which noble gas has the same electron configuration as the sulfide ion in ag2s? [1]

Lewis electron-dot diagram for the compound that tarnishes silver is given in the image.

Argon is the noble gas that has the same electron configuration as the sulfide ion

Explanation:

Silver utensils become tarnish due to reaction of a silver with hydrogen sulfide to from a black color coating of silver sulfide.

Lewis dot structures are the structures in which atoms along with their valence electrons are shown, And electrons are represented by dots.

In the Lewis dot structure of hydrogen sulfide two hydrogen atom with 1 valence electron each surrounds sulfur atom which have 6 valence electrons.

.An atomic number of sulfur is 16.Electronic configuration of sulfur is:

After gaining two electrons,sulfur atom becomes sulfide ions to gain stability of noble gas configuration.

Sulfur falls in third period in modern periodic period, in which the nearest noble gas to sulfur element is argon whose electronic configuration is given as:

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne