Answer:
I'll already answered that
Explanation:
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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
Answer:
Answer: Its atomic number is 2, so it has two protons in its nucleus. (I hope this helps!)
in order for a substance to be an effective mobile phase in a chromatography experiment, it must be able to move
In order for a substance to be an effective mobile phase in a chromatography experiment, it must be able to move different components of a mixture at different rates.
Chromatography involves the separation of substances using the application of the solubility differences in them. It has two phases known as the stationary and mobile phases.
The mobile phase involves motion which is why the ability of substances to move at different rates is a great factor in this type of phase. The Stationary phase on the other hand doesn't involve movement of substances.
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a boiling pot of soup with a lid on it to keep in the energy is what type of system?
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
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
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.
Is oxygen likely to gain or lose electrons when boding? Explain.
Oxit axit là nhưng oxit gì
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.
True or false: Atoms are mostly space. *
Answer:
false
Explanation:
Atoms make up everything and are made up of protons, neutrons, and electrons.
Hoped this helped!
What does a flat, horizontal line mean on a
DISTANCE-time graph?
Speeding up
Travelling at a constant speed
Not moving (motionless, stationary)
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!
The word "tropical" means that the air mass is __________. *
A. warm
B. cold
C. lukewarm
D. stable
viết các PTHH sau CuO + h20
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
Matter is defined as anything that has blank and blank
Answer:
Matter is anything that has mass and occupies space.
What kind of reaction is NaHCO3 = Na2O + H2O + CO2
Answer:
NaHCO3 = Na2O + H2O + CO2 is a decomposition reaction.
Balanced Equation : 2NaHCO3 → Na2O + H2O + 2CO2
Are two atoms of the same element identical?
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:
Why does silicone dioxide have a higher melting point than sodium chloride?
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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.(BRAINLIEST)
compounds that are used to reduce acidity of soil
Answer:
Pulverized Limestone
Explanation:
Hope it helps!!
What is the total number of atoms in this chemical formula?
C8H3 NaBr 12
Is the answer 12 24 25 18
Answer:
The total number of atoms in this chemical formula
C8H3 NaBr 12
8+3+1+12=24
what phenomenon is the basis behind the ability to separate miscible liquids by distillation?
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 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
Answer:
i believe it the last one
Explanation:
True or False: Polyatomic ions do not have a charge.
True or false: lonic compounds must have prefixes.
Answer:
first false
second false
Which color of light has the highest energy?
green
red
blue
violet
Answer:
Violet
Explanation:
It has the shortest wavelength and therefore the highest frequency.
Some solids such as glass can be heated and cooled in order to shape them. These are?
A.) Crystalline
B.)Amorphous
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)Combustion reactions take place between fuel and oxygen and produce carbon dioxide and water. Balance
the following combustion reaction.
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.
You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. is it chemistry or physical change?
Answer:
Chemical because water + metal = rust.
Explanation:
A new substance was formed.
Explain how CMB is observed on the Earth?
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:
answer for c plsssssss
Answer:
D has 18 electrons (since atomic number = protons = electrons)
[Ne]3s² 3p⁶ (spdf electron configuration)2, 8, 8 (basic electron configuration) ArgonE has 20 electrons
[Ar]4s² (spdf electron configuration)2, 8, 8, 2 (basic electron configuration)CalciumExplanation:
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.
what are those tiny bumps on our tongue?
Answer:
papillae
Explanation:
Answer:
parti Ng dila sguro! hecdsjsjves
How can you destroy the world by controlling
matter or atoms?
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? :/
How does Fluoroanimonic acid melt things?
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)
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What causes an earthquake?
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 type of elements are found in each group?
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.
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