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2 years ago

Potassium (K): 1s22s22p63s23p64s1 core electrons and valence electrons

Chemistry

2 answers:

storchak [24]2 years ago

6 0

18 core electrons
and 1 valence electron

Masja [62]2 years ago

5 0

<u>Answer:</u> An atom of potassium contains 18 core electrons and 1 valence electrons.

<u>Explanation:</u>

Core electrons are defined as the electrons which are present in the inner shells of an atom.

Valence electrons are defined as the electrons which are present in the outermost shell of the atom.

For the given electronic configuration of potassium (K): $1s^22s^22p^63s^23p^64s^1$

The outermost shell of this configuration is '4s' and rest are considered as inner shells.

Thus, an atom of potassium contains 18 core electrons and 1 valence electrons.

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How many covalent bonds does nitrogen form if each of its unpaired electrons participate in one bond?

nirvana33 [79]

Nitrogen could form 3 covalent bonds if each of its unpaired electrons participates in one bond.

Nitrogen atom forms 3 bonds based on octet rule, because it has 5 valence electrons. That means it needs 3 bonds or three more electrons.

<h3>Further Explanation;</h3><h3>Chemical bond </h3>

A bond is a type of force that is formed between atoms of different through the sharing or transfer of electrons.

<h3>Octet rule</h3>

According to the octet rule for an atom to be stable it must have maximum number of electrons in its outermost energy level. Therefore an atom with four electrons requires four more electrons to attain stability.

<h3>Types of chemical bonds.</h3><h3>Covalent bond </h3>

This is a type of bond that is formed between non-metal atoms. It is formed as a result of sharing electrons between non-metal atoms involved.
When atoms involved contribute equal number of electrons to the bond formation, the type of bond is known as covalent bond
A covalent bond may be a dative covalent bond, when the shared electrons come from one atom.

<h3>Ionic bond </h3>

This is a type of bond that occurs between metal ions and non-metal ions. Ionic bond occurs as a result of transfer of electrons from one metal atom to another non-metal atom.
After the transfer of electrons, metal atom loses electron to form a cation while the non-metal atom gains electrons to form an anion.

<h3>Other types of chemical bonds include;</h3>

Hydrogen bonds
Metallic bonds
Dipole-dipole interactions, etc.

Keywords: Chemical bond, covalent bond, atom

<h3>Learn more about:</h3>

Chemical bonds:brainly.com/question/5274289
Ionic bonds: brainly.com/question/5274289
Covalent bonds: brainly.com/question/5274289

Level: High school

Subject: Chemistry

Topic: structure and bonding

Sub-topic: Covalent bond

3 0

3 years ago

Read 2 more answers

The picture is above^ someone help me please :)

Ronch [10]

Answer:

idk plz do not report

Explanation:

8 0

2 years ago

A river with a flow of 50 m3/s discharges into a lake with a volume of 15,000,000 m3. The river has a background pollutant conce

spin [16.1K]

Explanation:

The given data is as follows.

Volume of lake = $15 \times 10^{6} m^{3}$ = $15 \times 10^{6} m^{3} \times \frac{10^{3} liter}{1 m^{3}}$

Concentration of lake = 5.6 mg/l

Total amount of pollutant present in lake = $5.6 \times 15 \times 10^{9} mg$

= $84 \times 10^{9}$ mg

= $84 \times 10^{3}$ kg

Flow rate of river is 50 $m^{3} sec^{-1}$

Volume of water in 1 day = $50 \times 10^{3} \times 86400 liter$

= $432 \times 10^{7}$ liter

Concentration of river is calculated as 5.6 mg/l. Total amount of pollutants present in the lake are $2.9792 \times 10^{10} mg$ or $2.9792 \times 10^{4} kg$

Flow rate of sewage = $0.7 m^{3} sec^{-1}$

Volume of sewage water in 1 day = $6048 \times 10^{4}$ liter

Concentration of sewage = 300 mg/L

Total amount of pollutants = $1.8144 \times 10^{10} mg$ or $1.8144 \times 10^{4}kg$

Therefore, total concentration of lake after 1 day = $\frac{131936 \times 10^{6}}{1.938 \times 10^{10}}mg/ l$

= 6.8078 mg/l

$k_{D}$ = 0.2 per day

$L_{o}$ = 6.8078

Hence, $L_{liquid}$ = $L_{o}(1 - e^{-k_{D}t}$

$L_{liquid}$ = $6.8078 (1 - e^{-0.2 \times 1})$

= 1.234 mg/l

Hence, the remaining concentration = (6.8078 - 1.234) mg/l

= 5.6 mg/l

Thus, we can conclude that concentration leaving the lake one day after the pollutant is added is 5.6 mg/l.

5 0

3 years ago

When scientists use one of their five senses to gather information, they are A. making an observation. B. making an inference. C

Goshia [24]

A. making an observation.

Explanation:

When scientists use one of their five sense to gather information, they are simply making an observation.

Most physical properties of matter are studied using sense of taste, of feel, sight, hearing and smell.

Observation is the act of making a measurement or studying.
It helps to investigate particular phenomenon in nature.
Most observations made with our senses are usually qualitative in nature.
They cannot be assigned values like quantitative ones.

learn more:

Observations brainly.com/question/5096428

#learnwithBrainly

7 0

2 years ago

Read 2 more answers

Which of the following is an oxidation-reduction reaction? Fe2O3 3CO Right arrow. 2Fe 3CO2 CuSO4 2NaOH Right arrow. Cu(OH)2 Na2S

Damm [24]

The reaction, Fe2O3 + 3CO------> 2Fe + 3CO2 is an oxidation-reduction reaction.

An oxidation-reduction reaction is a reaction in which there is a change in oxidation number from left to right in the reaction. This is because, a specie is oxidized and another specie is reduced.

In the reaction; Fe2O3 + 3CO------> 2Fe + 3CO2, we can see that the oxidation number of iron decreased from +3 on the left hand side to zero on the right hand side. The oxidation number of carbon was increased from + 2 to +4.

Learn more: brainly.com/question/10079361

6 0

1 year ago