Answer:
A. gold has the highest monetary value?
Among the given elements, gold has the highest monetary value. So the correct option is A.
What is gold?
Gold (Au) is a chemical element that belongs to Period 6's Group 11 (Ib) and is a thick, glossy golden valuable metal. Gold has historically been extremely valued due to a number of characteristics. It is typically found in nature in a relatively pure form, is appealing in colour and brightness, resilient to the point of virtual indestructibility, and very flexible.
Due to its perceived worth from the beginning, gold has a history that is unmatched by that of any other metal. Gold is one of the densest metals.
It is a good heat and electrical conductor. It is also the softest, most malleable, and ductile of all the elements; a troy ounce (31.1 grammes) of gold may be hammered into gold leaf, which can be crushed into sheets as thin as 187 square feet (approximately 17 square metres).
Therefore the correct option is A.
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Which of the following is the source of energy for nuclear energy?
Select one:
O a. Nuclear fusion
O b. Nuclear fission
OC. Nuclear Inclusions
O d. Nuclear Reactions
Answer:
b. Nuclear fission
Explanation:
how will beta decay affect the atomic number and mass number of the atom?
Answer:
Beta decay changes the atomic number of the nucleus by increasing the number of protons, by decreasing the number of neutrons while leaving the atomic mass essentially the same.
Which ion has a smaller size,1)N---,O--,F-and Ne 2) Cl-,Br- and I ?Why
Help me to solve it!
Answer:
nitrogen because it has less number of protons and electrons, thus a samller atomic mass
Explanation:
Explanation:
Ne have smaller size because Ne have no negative charge compare to N, O and F which negative charge depends on size of an atom, Therefore more the negative charge , more will be the size of atom.Cl- have smaller size because as we go down the group, Size of the atom increase as Cl<Br<I irrespective to the atomic chargeHELPPP PLZZZ ASAPPPPPO
Answer:
0.000471698
Explanation:
divide 0.125 by 265.
why is sodium chloride solution a good conductor of electricity but does not have any effect on litmus paper?
Answer:
Sodium chloride solution contain free electron to conduct electricity. But in solution is not acid or basic media that is why not active in litmus paper
Explanation:
The sodium chloride solution a good conductor of electricity but does not have any effect on litmus paper because sodium chloride solution have free electron to conduct electricity. But in solution is not acid or basic media.
Why is sodium chloride solution a good conductor of electricity?The sodium atoms and chlorine atoms separate when sodium chloride dissolves in water due to the influence of the water molecules. They are free to move as positively and negatively charged ions in the water. This charge separation enables the solution to conduct electricity.
Because cane sugar is a covalent compound bonded by electron sharing, a solution of cane sugar does not conduct electricity. There are no ions in the solution to conduct electrical charges across the solution.
Thus, sodium chloride solution have free electron to conduct electricity. But in solution is not acid or basic media.
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Balancing the equation below:
Can anyone please help me out with this formula equation.
Answer:
1: 1, 2, 3
2: 2, 2, 3
3: 2, 1, 2, 1
Explanation:
A simple way to do this:
Take an extra page and write your formula at the top, then take your elements (for example in #1, N and H) and write them on the reactants and products sides. On the reactants side write down the numbers you have (N-2, H-2) and the same for the products side (N-1, H-3). Find your GCF's and then you got your answer. It takes a bit of time to figure out HOW to do it but its a good skill to have. I have attached #1 for you.
If you have questions let me know!
Hope that helps
After many years,which cross section would pay likely result
How many mg of salt are in a 2.78 kg bag of salt?
Answer:
2,780,000mg
Explanation:
Using the Metric Staircase photo provided, you can calculate how many mg there are in 2.78 kg by simply moving the decimal point six places to the right, since the "Kilo" step takes six places to move to the "Milli" step.
2.78 kg
---------------
2 7 8 0 0 0 0 .
we can see that the decimal point is moved to the right six places.
Answer:
2,780,000mg
what is the gram formula mass of NazC03
Answer:
84,007 g/mol
Explanation:
Molar mass of NazCO3 which is Sodium Bicarbonate (NaHCO₃) is 84,007 g/mol
Name and Title:
Include your name, instructor's name, date, and name of lab.
Objectives(s):
In your own words, what is the purpose of this lab?
Hypothesis:
In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
Procedure:
The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.
Data:
Record the composition of each of your compounds below. Be sure to include the number of atoms for each element. An example has been supplied for you.
Compound Name Chemical Formula Sodium (Na) Atoms Calcium (Ca) Atoms Hydrogen (H) Atoms Oxygen (O) Atoms Carbon (C) Atoms Chlorine (Cl) Atoms
Ex: Sodium
hypochlorite NaClO 1 0 0 1 0 1
Conclusion:
Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.
Using two to three sentences, summarize what you investigated and observed in this lab.
Why do you believe knowing how elements and compounds react together is essential in everyday matters?
Some elements are more "reactive" than other elements; why do you think this is?
Choose one of the compounds from the table and explain how you know the numbers of atoms in your formula.
Is it possible for two different compounds to be made from the exact same two elements? Why or why not? With a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?
Answer:
I dont know your intructors name also do this yourself we dont know what the lab is
Explanation:
Which two elements in the d block do not transition and what are their changes when they make ions?
Answer:
scandium or zinc i think
Explanation:
Use your own words to define Resultant:
Use your own words to define Resultant
Answer:
the outcome of something
At what temperature does ice melt at 101kPa?
Answer:
Explanation: I also have a question if anyone can help in chem please
. What is the total number of protons, neutrons,
and electrons in a cadmium, Cd, atom that has
a mass number of 112?
PLEASE I NEED HELP
Answer:
# of Proton: 48
# of Electron: 48
# ofNeutron: 64
Explanation:
The atomic number of cadmium is 48.
∴ atomic number = protons = electrons = 48.
Neutrons = mass number - atomic number
∴ Neutrons = 112 - 48 = 64.
⇒ number of protons= 48; neutrons= 64; electrons=48
Use the diagram below to answer the Question.
Which convection zone region is shown at point 3?
Question 6 options:
polar region
temperate region
tropical region
Answer:
It should be tropical
Explanation:
tropical is the closest to the equator
BRAINLIEST?
If you compare the mass of a
substance before and after a
change, what will you find?
A. The mass before is greater than after.
B. The mass before equals the mass after.
C. The mass after is greater than before.
Answer:
the answer is (B)
the mass before equals the mass after
Methane's chemical formula is CH. Is there a bond between any of the hydrogen atoms? Why or why not? (1 point)
O No, there is not because carbon needs four bonds, so it bonds with each hydrogen atom; hydrogen only forms one bond.
Yes, there is because they form a long chain in order to all have stable outer energy shells.
O No, there is not because it would form H2 instead of methane if hydrogen bonded with itself.
Yes, there is because there are one too many hydrogen atoms for carbon to handle alone, so one hydrogen must bond with another.
Answer:
No, there is not because it would form H2 instead of methane if hydrogen bonded with itself.
Explanation:
from the shape of methane which is tetrahedral it's evident there's no hydrogen bond only C-H bond.
The chemical formula of methane is [tex]CH_4[/tex] but: C. No, there is no bond between any of the hydrogen atoms because it would form [tex]H_2[/tex] instead of methane if hydrogen bonded with itself.
A chemical bond is defined as the forces of attraction existing between ions, crystals, atoms or molecules and they are mainly responsible for the formation of chemical compounds.
This ultimately implies that, a chemical bond refers to a force holding two or more atoms together and binding ions, crystals, or molecules together, in order to form a chemical compound.
Methane comprises of an atom of carbon and four (4) atoms of hydrogen.
Basically, hydrogen only shares a single (one) valence electron with carbon but not itself (hydrogen atoms) to form methane because of the [tex]sp^3[/tex] hybridization.
Hence, there is no bond existing between any of the four (4) hydrogen atoms because it would form [tex]H_2[/tex] instead of methane ([tex]CH_4[/tex]), if hydrogen bonded with itself.
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Can you use molecular orbital theory to explain why fluorine is such a highly reactive gas?
The reactivity of fluorine can be explained from molecular orbital theory with the calculation of the bond order.
What is molecular orbital theory?The molecular orbital theory is assigned to explain the movement of the electrons in the bonding and anti-bonding orbitals.
The number of atom in the bonding and anti-bonding atomic orbits results in the elucidation of the bond order for the element.
The bond order and reactivity are inversely proportional to each other. The higher bond order depicts the presence of stronger bonds between the molecules and lower reactivity.
The bond order of fluorine atom is elucidated from the molecular orbital theory. The bond order of fluorine atom is 1, that explains the high reactivity of fluorine.
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how do you figure out how many neutrons you have? HELP
Answer:
The mass number is the sum of protons and neutrons. This means to find the number of neutrons you subtract the number of protons from the mass number.
Number of electrons present in 10th shell of
an atom
Answer:
there will be 8 electrons
Which halogen has 5 energy levels?
O iodine
bromine
Xenon
O nitrogen
Answer:
nitrogeno
Explanation:
creo xdddd
Answer:
bromine
Explanation:
(Ar)3d10,4s2,4p5
Use the reaction to answer the question.
Zn + 2HCI - ZnCl2 + H2
Which type of reaction is this?
(1 point)
o electronegative
O replacement
combustion
O ionic
Answer:
i think its replacement
Explanation:
By definition, the correct answer is the second option: the reaction is a replacement.
A simple substitution reaction or simple displacement reaction, called single-displacement reaction, is a reaction in which an element of a compound is substituted by another element involved in the reaction.
The starting materials are always pure elements and an aqueous compound. And a new pure aqueous compound and a different pure element are generated as products.
The general form of a simple substitution reaction is:
AB + C → A +BC
where C and A are pure elements; C replaces A within compound AB to form a new co, placed CB and elementary A.
A single-displacement reaction is characterized by a place of exchange of cations or anions with another to form a new product. A begins as an ion in the solution and appears elementally in the reaction products. In case of reagent C it starts in its elemental form and ends as an ion in an aqueous state forming compound BC.
In this case, it is a single replacement reaction where 1 atom of Zinc metal displaces 2 H⁺ ions from the hydrochloric acid to form hydrogen gas and zinc chloride, a salt.
Finally, the correct answer is the second option: the reaction is a replacement.
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https://brainly.com/question/11666844?referrer=searchResultshttps://brainly.com/question/21250889?referrer=searchResultshttps://brainly.com/question/7039713?referrer=searchResultsiii. According to the law of conservation of energy, what can change? (1 point) FAKES WILL BE REPORTED I EILL GIVE U BRAINLIEST
Answer:
Nothing can change because energy can't be made or destroyed
Explanation:
Which of the following is NOT an environmental threat from the use
of coal?
Select one:
O a Water Pollution
Ob Sound Pollution
Oa Solid Waste Buildup
O d. Air Pollution
3. How many seconds would it
take o radio wave to travel
from the planet Mars to
Earth when they are the
closest?
(Closest distance from Mars
to Earth = 54.6 million
kilometers)
Answer:
270 sec . ( = 4 min . 30 sec . ) Explanation: Any radio wave is moving at the speed of light, regardless of the frequency, so the frequency should be superfluous information. The speed is light is close to 300 , 000 k m s I take the distance you are given, to be 8.2 ⋅ 10 7 k m (since 8.2 ⋅ 107 k m doesn't make good sense - it's less than 1000 km) i.e. 82 , 000 , 000 km.
Before we actually compute this, we can notice that this is a little more than half the distance of the earth from the sun (150 mill. km), a distance the light uses 500 sek. = 8 min 20 sec. to travel, so we should get about 4 1 2 min for the radio wave to reach Mars from the earth.
Actual calculation: 82 , 000 , 000 km/300 , 000 k m s = 820 3 s = 273.3 s As the distance is given with 2 significant figures, we round this off to 270 sec = 4 min 30 sec.
Explantation:
Hope this helps =)
What group is this Element in?
Group 3
Group 4
Group 7
O Group 1
Answer:
Explanation:
It contains the elements titanium (Ti), zirconium (Zr), hafnium (Hf) and rutherfordium (Rf). This group lies in the d-block of the periodic table. The group itself has not acquired a trivial name; it belongs to the broader grouping of the transition metals.
nucleolus what is a nucleolus
Answer:
Its a small dense spherical structure in the nucleus of a cell during interphase.
(No link sharing)
The Law of Conservation of Mass states that
A. chemical reactions destroy matter, which
decreases the mass of the substance,
B. chemical reactions create new matter, which
will increase the mass of the substance,
C. matter cannot be created or destroyed, just
changed
The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed.
What type of chemical reaction is this?
Answer:
OXIDATION/REDUCTION
Explanation:
Ba has been transformed from a neutral atom to a +2 ion
O has been transformed from a neutral atom to a -2 ion
what is the maximum number of electrons that can exist in the g sublevel?
Answer:
14 electrons max
Explanation:
The s sublevel just has one orbital, so can contain electrons max