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3 years ago

If a neutral atom has 22 protons within its nucleus, how many electrons will it have orbiting the nucleus?

Chemistry

1 answer:

astraxan [27]3 years ago

3 0

Answer:

If a neutral atom has 22 protons inside its nucleus, it will have 22 electrons orbiting the nucleus.

Explanation:

An atom is the smallest amount of matter that undergoes chemical changes and is made up mainly of subatomic particles: electrons, protons and neutrons. The atomic nucleus is made up of protons, with a positive electric charge, and neutrons, which have no charge, while electrons, with a negative electric charge, revolve around the nucleus.

A neutral atom is one that lacks an electrical charge due to a trade-off between the number of its protons and electrons. In other words, although it has an electric charge, it is balanced between protons, electrons and neutrons. So in a neutral atom, the number of electrons equals the number of protons because the negative charge of the electrons is offset by the positive charge of the protons.

<u><em>If a neutral atom has 22 protons inside its nucleus, it will have 22 electrons orbiting the nucleus.</em></u>

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Calculate: (a) the weight (in lbf) of a 30.0 lbm object. (b) the mass in kg of an object that weighs 44N. (c) the weight in dyne

belka [17]

Answer:

a) 965,1 lbf

b) 4,5 kg

c) 1,33 * 10^6 dynes

Explanation:

Mass of an object refers to the amount of mattter it cotains, it can be expressed it gr, kg, lbm, ton, etc.

Weight of an object refers to a force, and is the measurement of the pull of gravitiy on an object. It may be definide as the mass times the acceleration of gravity.

w=mg

In Planet Earth, the nominal "average" value for gravity is 9,8 m/s² (in the International System) or 32,17 ft/s² (in the FPS system).

To solve this problem we'll use the following conversion factors:

1 lbf = 1 lbm*ft/s²

1 N = 1 kg*m/s²

1 dyne = 1 gr*cm/s² and 1 N =10^5 dynes

1 ton = 907,18 kg

1 k = 1000 gr

a) m = 30 lbm

$w = 30 lbm * 32,17 ft/s^{2} = 965, 1 \frac{lmb*ft}{s^{2} } = 965,1 lbf$

b) w = 44 N

First, we clear m of the weight equation and then we replace our data.

$m = \frac{w}{g} = \frac{44 N}{9,8 \frac{m}{{s}^{2}} } = 4,5 kg$

c) m = 15 ton

$m=15 ton * \frac{907,18 kg}{1 ton} = 13607,7 kg \\ w = mg = 13607,7 kg * 9,8 m/s2 = 133355,5 N * \frac{10^{5} dynes }{1 N} = 1,33 * 10^{6}dynes$

4 0

4 years ago

A potential energy diagram is shown. A graph is plotted with Potential Energy in KJ on the y axis and Reaction Pathway on the x

Leya [2.2K]

Answer:

NOT A

Explanation:

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4 years ago

Ten kilograms of R-134a fill a 1.595-m3 weighted piston-cylinder device at a temperature of −26.4°C. The container is now heated

Tju [1.3M]

Explanation:

The given data is as follows.

Mass of refrigerant, m = 10 kg

Volume of the refrigerant, V = 1.595 $m^{3}$

Formula for specific volume of the refrigerant is as follows.

v = $\frac{V}{m}$

= 0.1595 $m^{3}/kg$

So, at $-26.4^{o}C$ specific volume will be within $v_{f}$ and $v_{g}$ and pressure is constant.

The fluid will be in super-heated state at temperature $100^{o}C$ and at T = $-26.4^{o}C$ pressure 1 bar = 0.1 MPa.

According to super-heated tables, the specific volume is v = 0.30138 $m^{3}/kg$ .

Hence, the final volume will be calculated as follows.

$V_{f} = v \times m$

= $0.30138 m^{3}/kg \times 10 kg$

= 3.0138 $m^{3}$

Thus, we can conclude that final volume of the R-134a is 3.0138 $m^{3}$ .

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3 years ago

In the 17th century, Newton proposed that light was a stream of particles. The wave-particle debate continued for over 250 years

leonid [27]

Light as a wave

Young's Double Slit Experiment.
Davisson-Germer Experiment

Light as a particle

Einsteins Photoelectric Effect Phenomenon
Diffraction Phenomenon of Particles

<h2>Define the following terms:-</h2><h3> 1)Photoelectric Effect</h3>

Electrons are released when a material is exposed to electromagnetic radiation, such as light, and this is known as the photoelectric effect. These electrons are referred to as photoelectrons.

<h3>2)Diffraction </h3>

When a wave hits a wall or an opening, several phenomena known as diffraction take place. It is described as the interference or bending of waves through an aperture into the region of the geometric shadow cast by the obstruction or aperture.

<h3>3)Davisson-Germer Experiment</h3>

In the Davisson-Germer experiment, conducted by Clinton Davisson and Lester Germer between 1923 and 1927 at Western Electric (later Bell Labs), electrons scattered by a nickel-metal crystal's surface showed a diffraction pattern. This was an experimental turning point in the development of quantum mechanics and supported the wave-particle duality concept first put forth by Louis de Broglie in 1924.

<h3>4)Young's Double Slit Experiment.</h3>

One of the most significant physics experiments was Young's Double Slit experiment. Thomas Young directed it in 1801. Despite the fact that Huygens' experiment had demonstrated that light has a wave character, the light at the time was still thought of as a beam of particles due to Newton's renown.

Learn more about the photoelectric effect here:-

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2 years ago

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bixtya [17]

A.meter is the is the answer to the problem you and and if you need to know why then type back

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3 years ago

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