All categories

4 years ago

Which two Chemists organized elements based on properties such as how the elements react or whether they are solid on

Chemistry

2 answers:

Vera_Pavlovna [14]4 years ago

8 0

Lavoisier and Dobereiner

I hope this helps!

PolarNik [594]4 years ago

4 0

Answer:

Lavoisier and Dobereiner is the correct answer.

Explanation:

Lavoisier and Dobereiner two Chemists organized elements based on properties such as how the elements react or whether they are solid on
liquid.
Lavoisier and Dobereiner are the scientists who have done an important contribution to the periodic table.
Johann Wolfgang Dobereiner found the occurrence of classes of elements with alike chemical properties.
Lavoisier made major contributions made to understand the chemical properties in the periodic table.

You might be interested in

Consider the molecule BF3. (a) What is the electron config- uration of an isolated B atom? (b) What is the electron con- figurat

anzhelika [568]

For the given molecule, we are asked to give-

The electron configuration of an isolated B atom
The electron configuration of an isolated F atom
Hybrid orbitals should be constructed on the B atom to make the B–F bonds in Boron tri flouride
valence orbitals, if any, remain unhybridized on the B atom.

The electron configuration of an isolated B atom:

as atomic number of B is 5

electronic configuration will be [He] 2s² 2p¹

The electron configuration of an isolated F atom:

as atomic number of F is 9

electronic configuration will be [He] 2s² 2p5

Hybrid orbitals should be constructed on the B atom to make the B–F bonds in Boron tri flouride will be sp2.

as the one s and two of p orbital from the valance shell will hybridised to make 3 hybrid orbital of B resulting in 3 B-F bonds.

valence orbitals, if any, remain unhybridized on the B atom will be 1

To know more about hybrisisation:

brainly.com/question/23038117

#SPJ4

8 0

1 year ago

A 51.24-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 liters of solution. How many mL of this solution must be d

g100num [7]

Answer:

0.40 L

Explanation:

Calculation of the moles of $Ba(OH)_2$ as:-

Mass = 51.24 g

Molar mass of $Ba(OH)_2$ = 171.34 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{51.24\ g}{171.34\ g/mol}$

$Moles= 0.2991\ mol$

Volume = 1.20 L

The expression for the molarity is:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

$Molarity=\frac{0.2991\ mol}{1.20\ L}=0.24925\ M$

Thus,

Considering

$Molarity_{working\ solution}\times Volume_{working\ solution}=Molarity_{stock\ solution}\times Volume_{stock\ solution}$

Given that:

$Molarity_{working\ solution}=0.100\ M$

$Volume_{working\ solution}=1\ L$

$Volume_{stock\ solution}=?$

$Molarity_{stock\ solution}=0.24925\ M$

So,

$0.100\ M\times 1\ L=0.24925\ M\times Volume_{stock\ solution}$

$Volume_{stock\ solution}=\frac{0.100\times 1}{0.24925}\ L=0.40\ L$

The volume of 0.24925M stock solution added = 0.40 L

6 0

3 years ago

The thallium Subscript 81 Superscript 208 Baseline Tl nucleus is radioactive, with a half-life of 3.053 min. At a given instant,

Genrish500 [490]

Answer: (E) 300 bq

Explanation:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

Radioactive decay process is a type of process in which a less stable nuclei decomposes to a stable nuclei by releasing some radiations or particles like alpha, beta particles or gamma-radiations. The radioactive decay follows first order kinetics.

Half life is represented by $t_{\frac{1}{2}$

Half life of Thallium-208 = 3.053 min

Thus after 9 minutes , three half lives will be passed, after ist half life, the activity would be reduced to half of original i.e. $\frac{2400}{2}=1200$ , after second half life, the activity would be reduced to half of 1200 i.e. $\frac{1200}{2}=600$ , and after third half life, the activity would be reduced to half of 600 i.e. $\frac{600}{2}=300$ ,

Thus the activity 9 minutes later is 300 bq.

7 0

3 years ago

Exactly 10.7 mL of water at 28.0 °C is added to a hot iron skillet. All of the water is converted into steam at 100.0°C. The mas

kotegsom [21]

Answer:

The change in the temperature of the iron is a decrease of 14.0ºC.

Explanation:

See the file attached, since it was not possible to show the complete answer in the canvas.

Download pdf

3 0

3 years ago

Water is wet. true or false? Why?

Vikentia [17]

Answer:

True water is wet because when something is wet in this case it's water it has water on it at a molecular level. Water molecules are bonded on top of each other so it's wet.

5 0

3 years ago