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3 years ago

Which of the following correctly identifies the composition of an oxygen atom?

2 answers:

7 0

Oxygen has the atomic number 8, which eliminates options B and D right away. Any neutral atom, including the oxygen atom, has the same number of protons and electrons, meaning the number of electrons is also 8. If you're still not sold, the oxygen atom has a mass number of 16, which is the sum of the protons and neutrons in the atom, meaning there have to be 8 neutrons as well. The answer is option A.

aleksandrvk [35]3 years ago

3 0

The composition of an oxygen atom is: A) 8 protons, 8 electrons, and 8 neutrons.

<h3>Further Explanation</h3>

To determine how many of the subatomic particles are in the atom, the atomic number is used.

Atomic number is the number that gives the atom its identity and can be found in the periodic table. It gives the number of protons in an atom. It can be observed that the atomic number of the elements are increasing by one unit as you go from left to right.

<em>The atomic number of oxygen is 8, therefore, it has 8 protons.</em>

<em>In a neutral (uncharged atom), the number of protons and electrons are equal.</em>

<em>Hence, oxygen also has 8 electrons.</em>

In the most simple periodic table of elements, the atomic number is usually the smaller number written in the tile for each element. The larger number is the mass number.

The difference between the larger mass number and the smaller atomic number is the number of neutrons:

<em>Number of Neutrons = Mass Number - Atomic Number</em>

The mass number of oxygen is 16. We can use the atomic number and the mass number to get the number of neutrons using the equation above:

<em>Number of Neutrons = 16 – 8</em>

<em>Number of Neutrons = 8</em>

Therefore, it has been determined that the an oxygen atom has 8 protons, 8 electrons and 8 neutrons.

<h3>Learn More</h3>

Periodic Table brainly.com/question/2376134

Isotopes brainly.com/question/2757829

<h3>Keywords: protons, neutrons, electrons, mass number, atomic number</h3>

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A sample of helium gas is in a sealed rigid container. What occurs as the temperature of the sample is increased

hammer [34]

The electrons will move more rapidly resulting in a higher pressure even at a consistent volume

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4 years ago

synthesize the following compound from benzene. use a diazonium salt as one of the synthetic intermediates.

irina [24]

Reacting nitrous acid with aromatic amines to produce diazonium salt is one of the most used processes. An aromatic amine called aniline reacts with nitrous acid to generate benzene diazonium chloride, a diazonium salt.

To create azo colors, benzene diazonium chloride combines with phenol, -napthol, aniline, and 2-methylaniline. These reactions result in the removal of an HCl molecule. Red organic dye is created when benzene and benzene diazonium chloride interact. Since the solutions created in this method do not last, the reactions involving a diazonium salt are always carried out with a freshly prepared solution. Diazonium salts are very flammable when they are solid because of their instability.

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2 years ago

Chlorine is the most widely used disinfectant for killing pathogens during water treatment. Determine the kilograms of chlorine

makkiz [27]

Explanation:

The given data is as follows.

Flow of chlorine (Q) = $10,000 m^{3}/day$

Amount of liter present per day is as follows.

$10,000 \times 10^{3} l/day$

It is given that dosage of chlorine will be as follows.

10 mg/l = $10 \times 10^{-6}$ kg/l

Therefore, total chlorine requirement is as follows.

Total chlorine requirement = $(10,000 \times 10^{3}) \times (10 \times 10^{-6})$ kg/day

= 100 kg/day

Thus, we can conclude that the kilograms of chlorine used daily at the given water treatment plant is 100 kg/day.

4 0

3 years ago

What is the energy of a photon that emits a light of frequency 6.42 x 1014 Hz?<br><br>

svetlana [45]

Answer:

Option B. 4.25×10¯¹⁹ J

Explanation:

From the question given above, the following data were obtained:

Frequency (f) = 6.42×10¹⁴ Hz

Energy (E) =?

Energy and frequency are related by the following equation:

Energy (E) = Planck's constant (h) × frequency (f)

E = hf

With the above formula, we can obtain the energy of the photon as follow:

Frequency (f) = 6.42×10¹⁴ Hz

Planck's constant (h) = 6.63×10¯³⁴ Js

Energy (E) =?

E = hf

E = 6.63×10¯³⁴ × 6.42×10¹⁴

E = 4.25×10¯¹⁹ J

Thus, the energy of the photon is 4.25×10¯¹⁹ J

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4 years ago

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If energy is required to form monatomic ions from metals and nonmetals, why do ionic compounds exist?

jonny [76]

Ionic compounds are compounds that are composed of oppositely charged ions, anions and cations. The force which holds the two ions (charged atoms) together is called the electrostatic force, and the bond that exists between them is called an ionic bond.

An ionic bond can be formed after two or more atoms loss or gain electrons to form an ion. Ionic bonds occur between metals, losing electrons, and non metals, gaining electrons.

Monoatomic elements are elements that are stable as single atoms. The chemical elements which are stable single-atom molecules at standard temperature and pressure (STP) are noble gases. These are helium, neon, argon, krypton, xenon, and radon.

Ionic compounds are made up of oppositely charged ions which are held together by strong electrostatic force of attraction. Due to this reason, they are hard solids.

To know more Electrostatic force, refer to this link:

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1 year ago