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3 years ago

Write the advantages of modern periodic table write as more as you can and don't copy the same thing

Chemistry

1 answer:

Tema [17]3 years ago

3 0

Answer:

the advantages of modern periodic tables are given below and explained.

position of hydrogen:since hydrogen has the least atomic number i.e 1 ,it is kept in group 1 of modern periodic table, but still controversial due to its. dual characteristics since it shows the characteristics of borh group 1 and group 17.
position of isotopes :isotopes are element having the same atomic number but different atomic weight . Without any doubt all isotopes of one element and kept in one place.
position of lanthanide and acnitinides: element of Lanthanides series and element of Actinides series are kept below the main block of the periodic table as they have different properties from other elements.
correction of periodic law: some elements do not obey mendeleev periodic law , but when they are arranged according to atomic number they obey the modern periodic law.
position of alkali metals and coinage metals : in modern periodic table , alkali metal are kept in group IA and coinage metals are in group.

hope this helped you☺️

any confusion then comment it and let me know.

actually as I say these points say that the modern periodic table is better than mendeleev periodic table so, don't get confused.

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Sulfur is a nonmetalic mineral that has a density of 2 g/cm3. The volume of a sample of sulfur was measured to be 5.0 cm3. what

taurus [48]

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 2 × 5

We have the final answer as

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3 years ago

What volume in liters, l, of solution should sven prepare if he wants to make a 5.00 m solution using 210.0 grams, g, of sodium

weeeeeb [17]

To make a 5.00 M solution using 210.0 grams, g, of sodium chloride, NaCl, we will use the formula of volume of solution in liters is equal to mole of solute per molarity of solution, which is 0.718 L.

Molarity (M) refers to the amount of a substance in a specific volume of solution. It is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.

Molarity is given by the quotient,

Molarity = moles of solute/volume of solution in liters.

Now in order to get the molarity of the solution, we have to divide the moles of solute over the liters of solution. Since we are given the mass of the solute, we must first convert the mass of NaCl into moles with the help of the molar mass of NaCl as a conversion factor.

210 NaCl x ( 1 mol NaCl/ 58.44g NaCl) = 3.59 mol NaCl.

We already have the molarity of the solution that is 5.00 M. So the solution to find out the volume will be,

Volume of solution in liters = mole of solute/ molarity of solution,

That is 3.59 mol NaCl / 5M = 0.718 L

To learn more about Molarity, head here

brainly.com/question/8732513

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5 0

2 years ago

A chemist prepares a solution of aluminum sulfate (Al2(SO4) by weighing out 116.0 g of aluminum sulfate into a 450. mL volumetri

trasher [3.6K]

Answer:

0.0733 mol /dL

Explanation:

Mole -

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molecular mass .

From the information of the question ,

w = 116.0 g

As we know, molecular mass of aluminum sulfate ,

m = 342.15 g/mol

n = w / m

n = 116.0 g / 342.15 g/mol = 0.33 mol

Molarity -

Molarity of a substance , is the number of moles present in a liter of solution .

M = n / V

M = molarity

V = volume of solution in liter ,

n = moles of solute ,

The unit is mol / L ,

Hence , from the question, the value of molarity is asked ,

From the information of the question ,

V = 450 mL ,

Since,

1 mL = 0.01 dL

As, the unit asked in the question is in dL,

V = 4.5 dL

n = 0.33 mol ( as calculated above )

Using the above formula ,

M = n / V

M = 0.33 mol / 4.5 dL

M = 0.0733 mol /dL

M =

5 0

4 years ago

Which of the following elements will gain an electron to become an

Maurinko [17]

Answer:

F which is Flourine.

Explanation:

This is because it has 7 valence electrons therefore it will have to gain an electron to form an ion (anion) and become stable

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3 years ago

Why is it important for scientist to montior meteors in the sky?

stich3 [128]

It's important because you don't what it hit no beetles in the city

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3 years ago

Read 2 more answers

Write the advantages of modern periodic table write as more as you can and don't copy the same thing​

Write the advantages of modern periodic table write as more as you can and don't copy the same thing