1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nasty-shy [4]
3 years ago
13

which of the following correctly identifies the composition of an oxygen atom? A.8 protons, 8 electrons, and 8 neutrons. B.6 pro

tons, 6 electrons, 6 neutrons. C.8 protons, 6 electrons, 7 neutrons. D. 6 protons, 6 electrons and 12 neutrons
Chemistry
2 answers:
Ulleksa [173]3 years ago
8 0
<span>You can answer this question by getting the atomic number and atomic mass of Oxygen from a periodic table. There you will find that the atomic number is 8, that means, by definition, that it has 8 protons. This is, because atomic number is defined as the number of protons of an element. Given that the atom is neutral, that implies that the atoms have the same number of electrons than protons. So you already know that the oxygen atoms has 8 protons and 8 electrons. The number of neutrons can vary, which is what defines the isotopes. Given that the atomic mass of oxygen is 15.999, that means that most atoms of oxygen has 8 neutrons (8 protons +8 neutrons = 16 atomic mass). But you can not be sure that a specific atom of oxygen has 8 neutrons, nevertheless, given that the other options are discarded (because they do not have 8 protons and 8 electrons), the only correct answer is the option A. 8 protons, 8 electrons, and 8 neutrons.</span>
tigry1 [53]3 years ago
6 0

The composition of an oxygen atom is A. 8 protons, 8 electrons, and 8 neutrons. This can be determined by using information from the Periodic Table: atomic number and the mass number. The atomic number gives the number of protons. This is also equal to the number of electrons. The difference of the mass number and the atomic number gives the number of neutrons.

<h3>FURTHER EXPLANATION</h3><h3>Subatomic Particles in an Atom</h3>
  • Atoms are made up of subatomic particles: protons, neutrons, and electrons.
  • Protons and neutrons are found in the nucleus or center of the atom. Protons are positively charged and neutrons are uncharged.
  • Electrons are found in electron orbitals around the nucleus.
<h3>Periodic Table of Elements</h3>
  • The number of protons, neutrons, and electrons an element has can be determined from the atomic number and the mass number of the element. These are information that can be found in the Periodic Table.
  • In the simplest Periodic Tables, two numbers are found in the square for each element: the atomic number which is the smaller number and the atomic mass which is either given as a whole number or as a decimal.  
  • The atomic number tells the number of protons the element has. It gives the atom its identity.
  • In a neutral atom, the number of protons is equal to the number of electrons. Therefore, the atomic number also gives the number of electrons.
  • The atomic mass is the weighted average of the masses of the different forms of the element (or "isotope"). They usually are expressed in decimals. When this value is rounded off to a whole number, it can be indication of the total number of protons and neutrons in the atom. This is because the protons and the neutrons are the heavier subatomic particles and give the atom its mass. Hence, it is also called the mass number.
  • The mass number is the sum of the protons and the neutrons found in the nucleus of an atom.
<h3>Composition of an oxygen atom</h3>

Atomic Number = 8

Mass number = 16

  • number  of protons = atomic number = 8
  • number of electrons = atomic number = 8
  • number of neutrons = (mass number - atomic number)

                                           = 16 - 8

                                           = 8

<h3>LEARN MORE</h3>
  • isotopes brainly.com/question/5357969
  • isotopic notation brainly.com/question/419606
  • atomic mass brainly.com/question/1698344

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

You might be interested in
What is the standard electrode potential for a galvanic cell constructed in the appropriate way from these two half-cells?
____ [38]

E

θ

Cell

=

+

2.115

l

V

Cathode

Mg

2

+

/

Mg

Anode

Ni

2

+

/

Ni

Explanation:

Look up the reduction potential for each cell in question on a table of standard electrode potential like this one from Chemistry LibreTexts. [1]

Mg

2

+

(

a

q

)

+

2

l

e

−

→

Mg

(

s

)

−

E

θ

=

−

2.372

l

V

Ni

2

+

(

a

q

)

+

2

l

e

−

→

Ni

(

s

)

−

E

θ

=

−

0.257

l

V

The standard reduction potential

E

θ

resembles the electrode's strength as an oxidizing agent and equivalently its tendency to get reduced. The reduction potential of a Platinum-Hydrogen Electrode under standard conditions (

298

l

K

,

1.00

l

kPa

) is defined as

0

l

V

for reference. [2]

A cell with a high reduction potential indicates a strong oxidizing agent- vice versa for a cell with low reduction potentials.

Two half cells connected with an external circuit and a salt bridge make a galvanic cell; the half-cell with the higher

E

θ

and thus higher likelihood to be reduced will experience reduction and act as the cathode, whereas the half-cell with a lower

E

θ

will experience oxidation and act the anode.

E

θ

(

Ni

2

+

/

Ni

)

>

E

θ

(

Mg

2

+

/

Mg

)

Therefore in this galvanic cell, the

Ni

2

+

/

Ni

half-cell will experience reduction and act as the cathode and the

Mg

2

+

/

Mg

the anode.

The standard cell potential of a galvanic cell equals the standard reduction potential of the cathode minus that of the anode. That is:

E

θ

cell

=

E

θ

(

Cathode

)

−

E

θ

(

Anode

)

E

θ

cell

=

−

0.257

−

(

−

2.372

)

E

θ

cell

=

+

2.115

Indicating that connecting the two cells will generate a potential difference of

+

2.115

l

V

across the two cells.

5 0
2 years ago
Read 2 more answers
how much energy has your body used, in joules, if your health device indicates that 450 calories were burned during your workout
Likurg_2 [28]

Answer:

Total energy consumed = 1,882.8 joules

Explanation:

Given:

Calories burned = 450 calories

Find:

Total energy consumed

Computation:

1 calorie = 4.184 joules

So,

450 calories = 4.184 × 450

450 calories = 1,882.8 joules

Total energy consumed = 1,882.8 joules

7 0
3 years ago
How is earths moon different from the moons of other planets
Sedaia [141]
The earths moon is most like going to differ in size or even color
6 0
3 years ago
Read 2 more answers
Element: calcium symbol: Ca Atomic weight: g Mass of one mole: g/mol
Elena-2011 [213]

153g/mols I think this is the answer but not 100% sure.


6 0
2 years ago
If I mix bleach and namona and throw it on a person what will happen​
satela [25.4K]

Answer:

They have the chance to inhale toxic fumes secreted by the mixture.

Explanation:

7 0
3 years ago
Other questions:
  • How many grams of magnesium oxide forms when 8.0g of magnesium are burned?
    12·1 answer
  • Select the correct answer. _____enable long-term resistance to infections that have been present in the body before. A. Monocyte
    5·1 answer
  • Vitamin c is known chemically by the name ascorbic acid determine the empirical formula of ascorbic acid if it is composed of 40
    6·1 answer
  • Water boils at a higher temperature than a non-polar solvent like ether because...
    6·2 answers
  • Nucleotides have a phosphate group attached at the ___ carbon atom of the sugar.
    11·1 answer
  • On a warm summer day in Oslo, the temperature is 21 degree C and the relative humidity is 70%. What is the absolute humidity? Wh
    14·1 answer
  • Initially 10.0 mL of water was placed in a graduate cylinder and then a solid metal was immersed in the water in the graduated c
    10·1 answer
  • In the first step, copper was oxidized by nitric acid to make a green solution. Water was then added to the solution and the col
    10·1 answer
  • Why do pengiuns have beards
    14·2 answers
  • Chemical and physical element properties are determined by their valence electrons. How do you describe metals with only one val
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!