How many electrons does an atom have

1 answer:

4 0

In this question, the most probable answer that you would get would be that it depends. It depends on what kind of element are we talking about here. What is important to remember about these is that the number of electrons must always be equal to the number of protons. To get the numbers of electrons and protons of a certain element, just locate the atomic number of the said element. The number of protons is equal to the atomic number and the number of electrons is equal to the number of protons which is equal to the atomic number. If neutrons were to be added in the picture, just take the atomic weight of the element then round it off to the nearest whole number to get its mass number. Subtract the number of protons to the mass number and the difference would be the number of neutrons.

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How do substances and mixtures diifer

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Answer:

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A chemical is said to be stable if it is difficult to get it to react. This property of a chemical is a __________ property.

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Answer:

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The elements in which electrons are progressively filled in 4f-orbital are called.

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The elements in which electrons are progressively filled in 4f-orbital are called lanthanoids.

There are 15 metallic chemical elements called lanthanoids.

Those elements are with atomic numbers from 57 to 71.

Lanthanoids belong to f-block elements because of the filling of the 4f-orbitals.

One of the lanthanoids, lutetium (chemical symbol Lu) has 14 electrons if 4f orbitals.

Electron configuration of lutetium: [Xe] 4f14 5d1 6s2

f-orbitals are similar to the d orbital, but cut in half (eight lobes instead of four).

Lanthanoids are used not as materials in catalysts, alloys, lasers and cathode-ray tubes.

More info about lanthanoids: brainly.com/question/24413965

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1 year ago

What are characteristics of reliable science?

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Answer:

Reliable knowledge is knowledge that has a high probablility of being true because its veracity has been justified by a reliable method. Reliable knowledge is sometimes called justified true belief, to distinguish reliable knowledge from belief that is false and unjustified or even true but unjustified.

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2 years ago

Why is sodium metal (very soft and can cut easily) stored under oil?

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Sodium is a very reactive metal. It is kept in kerosene to prevent it from coming in contact with oxygen and moisture. If this happens, it will react with the moisture present in air and form sodium hydroxide.

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