Element whose atoms have completed their outer energy level are the ____

Chemistry

1 answer:

umka21 [38]3 years ago

5 0

Answer:

Noble gases

Explanation:

nobles gases have their outer energy level complete

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Which is an endothermic process?

natita [175]

Answer: Option (d) is the correct answer.

Explanation:

Endothermic process is a process in which energy or heat is absorbed by reactant species.

For example, melting of ice cubes is an endothermic process as it is absorbing heat from the surrounding and gives a cooling effect.

Thus, we can conclude that the process in which a substance gains energy is an endothermic process.

4 0

4 years ago

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A solid precipitate is formed from the reaction of lead nitrate and sodium chromate.

LUCKY_DIMON [66]

Lead chromate is a precipitate that is formed on the reaction of lead nitrate with sodium chromate. The best method to separate this precipitate from the solution is filtration.

A precipitate can be defined as an insoluble solid formed in a chemical reaction. It appears as a cloudy and resulted after a reaction.
The lead chromate is yellow colored precipitate that forms after the reaction of lead nitrate with sodium chromate.
The process of separation of insoluble solids from the liquids by the use of filters is known as filtration. Insoluble solids are also called as precipitates these precipitates are formed in a chemical reaction.
Filtration will help in separation of insoluble solid yellow colored lead chromate precipitate from the solution using a porous material or filter that selectively inhibits the passage of solid precipitate material and allows the solution to pass through it.