history of atomic structure​

Answers

Answer 1

Matter is composed of indivisible building blocks. This idea was recorded as early as the fifth century BCE by Leucippus and Democritus. The Greeks called these particles atomos, meaning indivisible, and the modern word “atom” is derived from this term. Democritus proposed that different types and combinations of these particles were responsible for the various forms of matter. However, these ideas were largely ignored at the time, as most philosophers favored the Aristotelian perspective.


Related Questions

Explain how CMB is observed on the Earth?

Answers

Answer:

the speed of light (all photons, naturally including those from the CMB, travel at the speed of light relative to you, regardless of frame or your velocity).

But I suspect you’ve asked this question because of a totally understandable but not quite correct set of assumptions about the universe. If my hunch is correct, you understand the CMB a bit like the skin of a balloon, gradually expanding over time. The Earth is a point somewhere in this balloon, and you’re asking about the Earth’s velocity relative to perhaps the center of this balloon. But that’s not quite how the universe works. It’s far more strange.

Our best hypothesis thus far is that the Big Bang happened from a single point. The “space” around us IS that single point. There is no origin point, since everywhere is by definition the origin point. You can see this for yourself by noticing that basically every star and galaxy we can see is - in the long run - moving away from us. And this is true regardless of whether you are on Earth or another star, or any point in the universe. So from this, it doesn’t really make sense to ask what the velocity of the earth is relative to the CMB rest frame, because space itself is expanding. Hopefully haven’t caused too many headaches!

Explanation:

Combustion reactions take place between fuel and oxygen and produce carbon dioxide and water. Balance
the following combustion reaction.

Answers

This is a combustion reaction of an alkane with oxygen. It is exothermic (

Δ

H

<

0

), and can be balanced in normal methods for balancing chemical equations ie ensuring that the total number of atoms of each element is the same on both sides of the equation.

Are two atoms of the same element identical?​

Answers

Answer

Two atoms of the same chemical element are typically not identical. ... Two atoms of the same element can be different if their electrons are in different states. If one copper atom has an electron in an excited state and another copper atom has all of its electrons in the ground state, then the two atoms are differenter:

Explanation:

viết các PTHH sau CuO + h20

Answers

Answer:

An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. In redox reaction the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

In the reaction : CuO+H  

2

⟶Cu+H  2 O  

n the reaction H2

  is oxidized since it has lost electrons and Cu is reduced since it has gained electrons.

Explanation:

hope this helps

Why does silicone dioxide have a higher melting point than sodium chloride?

Answers

[tex]\color{Black}\huge{Answer} [/tex]

It has a very high melting point as the ionic bond is very strong between them. More force is required to break down. Silicon dioxide is a giant covalent structure. It also has the highest melting point because the covalent bonds between them is the strongest.

answer for c plsssssss

Answers

Answer:

D has 18 electrons (since atomic number = protons = electrons)  

[Ne]3s² 3p⁶   (spdf electron configuration)2, 8, 8             (basic electron configuration) Argon            

E has 20 electrons    

[Ar]4s²         (spdf electron configuration)2, 8, 8, 2      (basic electron configuration)Calcium

Explanation:

In spdf form, we are basically spreading out the total number of electrons over the different spdf orbitals. While doing this we have to remember that an s-orbital holds 2 electrons max, a p-orbital holds 6 electrons max, a d-orbital holds 10 electrons max, and an f-orbital holds 14 electrons max.

Based on energy levels, the orbitals are filled in the following order:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, and 7p

So for example Argon with 18 electrons would be filled in the following way:  

1s², 2s², 2p⁶, 3s², 3p⁶.

This can be abbreviated using the configuration of the previous Noble gas for example [Ne] = 1s², 2s², 2p⁶

∴ we can express Argon as [Ne] 3s², 3p⁶.

How can you destroy the world by controlling
matter or atoms?

Answers

Answer:

Make them all gather up at the core of the Earth so it will attract everything towards it and practically just condense the planet.

But why are you even planning to do that? :/

What is the total number of atoms in this chemical formula?
C8H3 NaBr 12
Is the answer 12 24 25 18

Answers

Answer:

The total number of atoms in this chemical formula

C8H3 NaBr 12

8+3+1+12=24

what are those tiny bumps on our tongue?​

Answers

Answer:

papillae

Explanation:

Answer:

parti Ng dila sguro! hecdsjsjves

True or false: Atoms are mostly space. *

Answers

Answer:

false

Explanation:

Atoms make up everything and are made up of protons, neutrons, and electrons.

Hoped this helped!

You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. is it chemistry or physical change?

Answers

Answer:

Chemical because water + metal = rust.

Explanation:

A new substance was formed.

a boiling pot of soup with a lid on it to keep in the energy is what type of system?

Answers

Answer:

Closed system. :)

Explanation:

When the lid on the pot of soup is closed, it means matter can no longer escape, which in turn, makes it a closed system. I hope this helps, please let me know if you have any further questions

Is oxygen likely to gain or lose electrons when boding? Explain.

Answers

Well Oxygen is an oxidizer, It will gain electrons in a reaction to complete its valence shell.

Some solids such as glass can be heated and cooled in order to shape them. These are?
A.) Crystalline
B.)Amorphous

Answers

Answer:

Amorphous

Explanation:

Some solids such as glass can be heated and cooled in order to shape them.

These are Amorphous.

Glass is amorphous solid (or psuedo solid or super cooled liquid)

(BRAINLIEST)
compounds that are used to reduce acidity of soil

Answers

Answer:

Pulverized Limestone

Explanation:

Hope it helps!!

The most common way to raise the pH of soil is to add pulverized limestone to the soil. Limestone acts as a soil acid neutralizer and consists of either calcium and magnesium carbonate or calcium carbonate. These are called dolomitic limestone and calcite limestone respectively.

Hope it helps!

An atom of mercury contains 120 neutrons in its nucleus and
80 electrons around it. It contains protons in its nucleus
and its atomic number is

Answers

Answer:

Answer: Its atomic number is 2, so it has two protons in its nucleus. (I hope this helps!)

How does Fluoroanimonic acid melt things?

Answers

Answer:s the temperature is increased, fluoroantimonic acid decomposes and generates hydrogen fluoride gas (hydrofluoric acid). ... 1  Fluoroantimonic acid has a H0 (Hammett acidity function) value of -31.3. Dissolves glass and many other materials and protonates nearly all organic compounds (such as everything in your body)

tall me is this what you looking for

According to scientific thought, what is a theory? O a a confirmed hypothesis O an unsubstantiated idea an interpretation supported by facts O a controversial guess

Answers

Answer:

- an interpretation supported by facts.

Explanation:

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.

What kind of reaction is NaHCO3 = Na2O + H2O + CO2

Answers

Answer:

NaHCO3 = Na2O + H2O + CO2 is a decomposition reaction.

Balanced Equation : 2NaHCO3 → Na2O + H2O + 2CO2

The word "tropical" means that the air mass is __________. *
A. warm
B. cold
C. lukewarm
D. stable

Answers

they word tropical means warm

what phenomenon is the basis behind the ability to separate miscible liquids by distillation?

Answers

Answer:

The basis of the separation by steam distillation is that while the water and organic condensed phases are immiscible, the vapors of both are miscible. Once condensed, the two separate again allowing for an easy separation. As noted above, both liquids and solids can be distilled by steam.

Explanation:

I hope this helps!

which kind of change alters the shape of an object without changing what type of matter it isITS RIELLY SCIENCE

Answers

Answer:

Ice carving. It's still ice, it's not water, and it changes shape while not changing it's matter

Explanation:

What type of elements are found in each group?

Answers

Group 1 of the periodic table consists of hydrogen and the alkali metals. ...

Group 2 consists of the alkaline Earth metals. ...

Groups 3–12 contain transition metals. ...

Groups 13–16 each contain at least one metalloid. ...

Group 17 contains halogens. ...

Group 18 consists of noble gases.

Answer:

Groups are numbered 1–18 from left to right. The elements in group 1 are known as the alkali metals; those in group 2 are the alkaline earth metals; those in 15 are the pnictogens; those in 16 are the chalcogens; those in 17 are the halogens; and those in 18 are the noble gases.

HOPE IT'S HELP

FOLLØW ME PLEASE THANKS IN ADVANCE

Heart my answer if it's helpful

BRAINLIEST MY ANSWER IF you want

Which color of light has the highest energy?

green


red


blue


violet

Answers

Answer:

Violet

Explanation:

It has the shortest wavelength and therefore the highest frequency.

True or False: Polyatomic ions do not have a charge.


True or false: lonic compounds must have prefixes.​

Answers

Answer:

first false

second false

Which of the following led to the Middle English language of Chaucer?

American Indians' word choice and language
Anglo-Saxon tribes that came from Germany
Modern English factors after years of struggle and invasion
Normans from France who conquered the Anglo-Saxons

Answers

Answer:

i believe it the last one

Explanation:

Matter is defined as anything that has blank and blank

Answers

Answer:

Matter is anything that has mass and occupies space.

What causes an earthquake?

Answers

Answer:The earths plates shifting

Explanation: The movement releases stored-up 'elastic strain' energy in the form of seismic waves, which propagate through the Earth and cause the ground surface to shake.

What does a flat, horizontal line mean on a
DISTANCE-time graph?
Speeding up
Travelling at a constant speed
Not moving (motionless, stationary)

Answers

Answer:

Explanation:

A straight horizontal line on a speed-time graph means that speed is constant. It is not changing over time. A straight line does not mean that the object is not moving!

Oxit axit là nhưng oxit gì

Answers

Answer:

Là những oxit tác dụng với bazo để tạo ra muối và nước, phản ứng với nước tạo thành một axit.

Những oxit axit thường gặp: CO2, SO2, SO3, P2O5, Mn2O7.

Other Questions
The perimeter of a square is 28cm.Work out the area of the square. In a pen picture, each of the three lines is a. The subject Once Christopher Columbus landed in the Americas, what did he decide to do? (choose A B or C D)A. Concentrate on the search for gold.B. Bring as many Spaniards as he could to the New World.C. Cure disease in the AmericasD. Kill all the natives. 80% of what number is 15? Round the answer to the nearest tenth Does Gertrude go to Heaven or Hell? There are two questions here if you could answer both of them it would be greatTrue or False More Americans attended high school in 1920 than hadattended in 1880.*2 pointsTrueFalseWhich of the following WAS NOT a new course of study at colleges in the 2 pointsearly 1900's?pyschologysociologytheology A student adds 10 drops of a copper sulfate and sodium hydroxide solution to a test tube containing milk. The solution undergoes a color change from blue to purple. The presence of which organic molecule is indicated by the color change of the solution?A.) Carbohydrate B.) ProteinC.) LipidD.) Nucleic Acid Which sentence from the text most strongly supports the answer to Question 5?Al desired the secretary to present my humble duty to the emperor, and to let him know, that I thought it would not become me, who was a foreigner, to interferewith parties, but I was ready, with the hazard of my life, to defend his person and state against all Invaders."B. "Now, in the midst of these intestine disquiets, we are threatened with an invasion from the Island of Blefuscu, which is the other great empire of the universe,almost as large and powerful as this of his majesty."C. This resolution perhaps may appear very bold and dangerous, and I am confident would not be Imitated by any prince in Europe on the like occasion."D. "Whereupon the emperor his father published an edict, commanding all his subjects, upon great penalties, to break the smaller end of their eggs." f(t)= x2 + 2; Find f(-6) SOMEONE PLSSSS HELP IS DUE IN 10 MINUTES!!!! what is the perspective of charlie Chaplin's on society Identify three diseases of the respiratory system, and state what triggers or causes each disease. 2(-1)+y=3What is the answer she is cooking in passive voice in all 12 tenses Part A Why does the author of "With a Little Help From My Friends" say she was lucky to come to America before the political upheaval in Iran?a. Iranians could not easily travel to America after the upheaval.b. Iranians were mostly distrustful of America after the upheaval.c. Tranians did not want to visit America after the upheaval.d. Iranians were not always welcomed by Americans after the upheaval.Part B Which quotation from the selection best supports the answer to Part A?a. My father then explained that Iranians are an Indo-European people; weare not Arabs.b. Another neighbor, a kindly old lady who taught me how to take care ofindoor plants, asked whether we had many cats back home. My father,with his uncanny ability to forge friendships, said, "We don't keep pets inour homes. They are dirty."c. Even though my mother never attended a Brownie meeting, she knew The force excerted by air molecules in all directions is called Clerks, Secretaries, sales, and nurses were all new jobs that opened up forO womenO the lower classO arstocrats please help me pass it describe how heat energy can be transferred to either kinetic energy or gravitational potential energy what is 1*5+89 20 points