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3 years ago

Who proposed the plum pudding model and what does it say about the structure of the atom

Chemistry

1 answer:

mina [271]3 years ago

4 0

Answer:

J. J. Thomson

Explanation:

First proposed by J. J. Thomson in 1904 soon after the discovery of the electron, but before the discovery of the atomic nucleus, the model tried to explain two properties of atoms then known: that electrons are negatively-charged particles and that atoms have no net electric charge.

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Will Rb and I form an iconic or covalent bond?

sergeinik [125]

Answer:

Most compounds of Rubidium are formed by ionic bonds.

Explanation:

8 0

3 years ago

Figure

Artyom0805 [142]

Answer:

Explanation:

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3 years ago

Automobile airbags inflate due to the formation of nitrogen gas from the chemical reaction 2NaN3(s)⟶3N2(g)+2Na(s) Identify the n

Vera_Pavlovna [14]

First part:

2 atoms of Na

6 atoms of N

Second part:

2 atoms of N

2 atoms of Na

Why?

We are given the chemical reaction, so, we can extract the number of atoms for both reactants and products.

We are given the chemical equation:

$2NaN_{3}=3N_{2}+2Na$

We can rewrite it as follow:

$2(NaN_{3})=3N_{2}+2Na$

From the reactants, we have:

$2(NaN_{3})$

$2Na=2atoms\\2N_{3}=2*3=6atoms$

From the products we have:

$3N_{2}+2Na$

$3N_{2}=3*2=6atoms$

$2Na=2atoms$

Hence, we have that:

There are 6 atoms of N in the reactants and 6 atoms of N in the products.

and

There are 2 atoms of Na in the reactants and 2 atoms of Na in the products since we have a balanced equation.

Have a nice day!

6 0

3 years ago

Heavier noble gases are able to form compounds with other elements under specific conditions because their valence ____are farth

e-lub [12.9K]

Answer:

Heavier noble gases are able to form compounds with other elements under specific conditions because their valence electrons are farther from the nucleus.

Explanation:

The name of noble or inert gas is due to the lack of reactivity with other elements. This is due to its electronic configuration, because its outermost shell or valence shell is always complete, without the need to share, give or receive electrons forming bonds. That is, its outer layer is so stable that the element tends not to react with others except in very specific cases.

These exceptions generally involve the heavier noble gases, such as xenon or radon, capable of forming compounds with fluorine and oxygen. This is because the heavier noble gases have more electron shells than the lighter ones. This characteristic causes the outermost electrons to experience a "shielding" effect due to the action of the inner electrons, and they can then be ionized more easily, since the attraction they receive from the positive charges of the nucleus is weaker. That makes the ionization energy low enough to form stable compounds with more electronegative elements, such as fluorine and oxygen.

Heavier noble gases are able to form compounds with other elements under specific conditions because their valence electrons are farther from the nucleus.

5 0

3 years ago

Type the correct answer in the box. express your answer to three significant figures. an air mattress is filled with 0.55 moles

dmitriy555 [2]

385 L is the volume of the air mattress with 0.55 moles of air inside the mattress and a temperature of 295 K.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates to the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Using the gas law,

PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.

Given data:

P= 3.5 kPa

V=?

n= 0.55 moles of air

T= 295K

R= 8.314 (L kPa/mol K)

Putting value in the given equation:

V= $\frac{nRT}{P}$

V = $\frac{(0.55 moles)(8.314 L kPa/mol k)(295 K)}{3.5 kPa}$

V = 385.4132857 L

And whatever the significant figure is asked for, for example, 3 significant figures: the answer would be 385 litres.

Hence, 385.4132857 L is the volume of the air mattress.

Learn more about the ideal gas here:

brainly.com/question/27691721

#SPJ1

5 0

2 years ago