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2 years ago

Mercury is in the 80th position in the periodic table. How many protons does it have?

Physics

2 answers:

ipn [44]2 years ago

3 0

Number of Protons = Atomic number = 80

so, Mercury has 80 protons...

Lera25 [3.4K]2 years ago

3 0

Answer: 80

Explanation:

Elements are arranged in periodic table in order of increasing atomic number.

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons

Mercury (Hg) is a d block element and its atomic number is 80, thus it contains 80 protons and 80 electrons.

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

Electronic configuration of mercury in terms of noble gas configuration is $[Xe]4f^{14}5d^{10}6s^{2}$ .

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A person is placed in a large, hollow, metallic sphere that is insulated from ground. (a) If a large charge is placed on the sph

stiv31 [10]

Answer:

Explanation:

It is given that the sphere is insulated from ground and a large charge is placed on the sphere. The charge on the hollow sphere will always remain on the outer surface of the sphere and there will be no charge on the inner surface of the sphere.

If a person touches the inner surface of the sphere then he will not be harmed as there is no charge on the inner surface of the sphere.

If a person carries the charge of the opposite sign of the same magnitude then the sphere and person get neutralized upon touching the sphere.

If a person does not touches the sphere then the charge on the outer surface will be zero and there will be a positive charge on the inner surface of the sphere

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2 years ago

An elevator accelerates upward at 2.0 m/s?,

amm1812

Answer:

Force the floor exerts on the passenger is 833 N.

Explanation:

Weight of passenger ( $F_{g}$ ) = mg = 85 × 9.8 N = 833 N

Force the floor exerts on the passenger ( $F_{N}$ ) = ?

For the elevator with the speed as 2.0 m/s the net force is zero, it means that the force is balanced.

i.e. $F_{N}$ = - $F_{g}$ = -mg = 833 N

hence $F_{N}$ is 833 N

If the lift was not at a constant speed i.e. if it had acceleration ( $m/s^{2}$ ) then the case would be different.

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2 years ago

The cosmic microwave background essentially looks the same in all directions. This is an example of.

pentagon [3]

In general, all views of the cosmic microwave background are identical. Isotropy is demonstrated by this.

<h3>What exactly is isotropy, for instance?</h3>

The Greek words isos (equal) and tropos, from which the term "isotropy" is derived, mean "uniform in all directions" (way). The material properties of anisotropic materials, such as graphite, differ depending on the direction, in contrast to isotropic materials like glass, which show the same properties in all directions.

There is no "centre" to an isotropic universe, which is another characteristic. The North and South Poles are produced by the rotation of the Earth, giving them a distinctive orientation, but the Universe is visible from every angle. When we think about the Big Bang, which is the origin of the Universe, this is a crucial point.

To know more about cosmic microwave background visit:

brainly.com/question/28197648

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10 months ago

Explain why a roller coaster’s second hill cannot be taller than the first hill.

max2010maxim [7]

There will not be enough momentum from the first hill to cross another hill if he same or larger size because of the way potential energy and kinetic energy works it will not be able go as high as it could go on he fist hill.

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Nonamiya [84]

Solar energy or sunlight...

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