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3 years ago

Explain the importance of the periodic table

Chemistry

2 answers:

Sergeu [11.5K]3 years ago

8 0

Answer:

the importance of the periodic table are,

To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

Explanation:

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Licemer1 [7]3 years ago

4 0

Answer:

In fact, the periodic table is so accurate that it allows scientists to predict the chemical and physical properties of elements that hadn't yet been discovered. ... "The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties," said Mendeleev.

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A mountaineer shouts for help Half a second later (0.5 she hears the echo How far away is the rock face which is reflecting her

Tema [17]

Answer:

82.5 metres

Explanation:

speed=330m|s

initial time taken =0.5÷2=0.25

distance=speed×time

330m|s × 0.25s = 82.5m

6 0

3 years ago

An atom has radius of 227 pm and crystallizes in a body-centered cubic unit cell. What is the volume of the unit cell

sdas [7]

We will see that the volume of the unit cell is 144,070,699.06 pm^3

<h3>How to get the volume of a body-centered cubic unit cell?</h3>

In a body-centered cubic unit cell, the side length of the cube is given as:

$S = \frac{4}{\sqrt{3} } *R$

Where R is the radius of the atom.

And the volume of a cube is the side length cubed, then we can see that the volume of our cube will be:

$V = S^3 = (\frac{4}{\sqrt{3} }*227pm)^3$

Solving that we get:

$V = (\frac{4}{\sqrt{3} }*227pm)^3 = 144,070,699.06pm^3$

This is the approximated volume of the unit cell.

If you want to learn more about unit cell structures, you can read:

brainly.com/question/13110055

5 0

2 years ago

A fuel-air mixture is placed in a cylinder fitted with a piston. The original volume is 0.310-L. When the mixture is ignited, ga

Soloha48 [4]

Answer:

$V_2=11.35L$

Explanation:

Knowing that the system is at constant pressure, the energy balance is:

$\Delta H=Q-W$

If all the energy (enthalpy of combustion) is transformed into work:

$\Delta H=-W$

Work:

$W=-\int_{V1}^{V2}P*dV$

$W=-P*(V_2-V_1)$

$\Delta H=P*(V_2-V_1)$

Calculating:

$935J=84659 Pa*(V_2-3.1*10^{-4}m^3)$

$V_2=0.0113 m^3=11.35L$

3 0

3 years ago

Given the following equation:

Anna [14]

Mass of KMnO4 required : 31.607 g

<h3>Further explanation </h3>

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products

Reaction

2KMnO₄ → K₂MnO₄ + MnO₂ + O₂

mol of O₂ :

$\tt \dfrac{1.6}{16}=0.1$

mol ratio KMnO₄ : O₂ = 2 : 1

mol of KMnO₄ :

$\tt \dfrac{2}{1}\times 0.1=0.2$

mass of KMnO₄ :

MW KMnO₄ : 158,034 g/mol

$\tt mass=0.2\times 158,034 =31.607~g$

4 0

3 years ago

Write the chemical symbols for three different atoms or atomic anions with 10 electrons.

anzhelika [568]

Answer:

i) Neon (Ne)

ii) Fluoride Ion (F⁻¹)

iii) Oxide Ion (O⁻²)

Explanation:

Ions are those charged species which are either positively charged (by loosing electrons) called as cations or negatively charged (by gaining electrons) called as anions.

In given examples, Neon is a neutral atom which has an atomic number 10. It contains 10 electrons in its neutral state with the electronic configuration 1s², 2s², 2p⁶.

Fluorine atom has an atomic number of 9. Therefore, it contains 9 electrons in its neutral state with an electronic configuration of 1s², 2s², 2p⁵. When Fluorine atom gains one electron it gets 10 electrons with electronic configuration of 1s², 2s², 2p⁶.

Oxygen atom has an atomic number of 8. Therefore, it contains 8 electrons in its neutral state with an electronic configuration of 1s², 2s², 2p⁴. When Oxygen atom gains two electron it gets 10 electrons with electronic configuration of 1s², 2s², 2p⁶ forming an Oxide Ion.

8 0

4 years ago

Explain the importance of the periodic table​

Explain the importance of the periodic table