Answer:
Even the most powerful light-focusing microscopes can't visualise single atoms. What makes an object visible is the way it deflects visible light waves. Atoms are so much smaller than the wavelength of visible light that the two don't really interact. To put it another way, atoms are invisible to light itself.
Explanation:
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Answer:
The atoms are too small to see.
Explanation:
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What is the warmest layer of the atmosphere?
Answer:
Explanation:
The thermosphere is often considered the "hot layer" because it contains the warmest temperatures in the atmosphere. Temperature increases with height until the estimated top of the thermosphere at 500 km. Temperatures can reach as high as 2000 K or 1727 ºC in this layer (Wallace and Hobbs 24).
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If an atom contains 5 positively charged protons and 5 negatively charged electrons the total charge on each atom is zero. In your own words explain why the total charge on the atom is zero.
Answer:
When an atom is electrically neutral, it means that the overall charge of the atom is zero. ... The charge from a proton or electron are of equal strength, therefore if an atom has an equal number of protons and electrons, it will be electrically neutral.
Explanation:
Answer:
Protons have a positive electric charge, and neutrons are neutral which means they have no electric charge. Atoms normally have the same number of protons and electrons. The negative charge of the electron cancels out the positive charge of the proton giving the atom a zero net (or neutral) charge.
Antoine Lavoisier made chemicals react within a closed container. The mass of the container and chemicals after the reaction weighed the same as the container and chemicals before the reaction showing that no mass was lost. This led to the Law of __________________.
Action-Reaction
Elasticity
Atoms
Conservation of Mass
Answer:
Conservation of Mass
Explanation:
I did the test on K12
Answer:
Conservation of Mass
Explanation:
Lavoisier conducted many experiments of this type. He found in all cases that the mass of the reactants is equal to the mass of the products. His conclusion, called the states that in a chemical reaction, atoms are neither created nor destroyed. - www.classzone.com
Only smart people are allowed to answer ONLY smart people............... If you can answer this correctly then maybe you are actually yourself!!!
Fill in the blanks: ______ compounds break up into ______ and ______ in solution, which can move freely and carry an _______ current.
Answer:
Fill in the blanks: IONIC compounds break up into ANIONS and CATION in solution, which can move freely and carry an ELECTRICAL current.
How is covalent bonding typically explained?
Answer: Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell.
Explanation: I hope that helped and Happy friday.
What element has 7 valence electrons on it's 5th energy level?
Answer:
Chlorine has 7 valence shell electrons, 2 in the 3s orbital and 5 in the 3p orbital. Since a full shell of valence electrons (8) is the most stable configuration, chlorine tends not to lose electrons but to gain one electron to fill the final 3p orbital and give it 8 valence electrons like its neighboring noble gas argon
Explanation:
i hope this helped
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. The element which has 7 valence electrons on it's 5th energy level is Iodine.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
Valence shell is the last shell to which electrons are being filled. Since 7 valence electron are present in 5th shell of the element. So, we know that in whole periodic table group 17 or halogen family contains 7 electrons in its valence shell. 5th energy represents the number of period. So, the given element is Iodine.
The electronic configuration of Iodine is
[Kr] 4d¹⁰ 5s² 5p⁵
Therefore, the element which has 7 valence electrons on it's 5th energy level is Iodine.
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Which item in Figure 1 expanded the least when heated?
steel
oak
aluminum
glass
Answer:
glass your welcome
Explanation:
definition of conduct (in physics)
Answer:
transitive physicsif something conducts heat or electricity, heat or electricity can move through it.
Explanation:
Hello good afternoon...God bless here is the answer to your following question-
definition of conduct (in physics)- transitive physics if something conducts heat or electricity, heat or electricity can move through it.
Which element has the electron configuration 1s22s22p63s23p3? Nitrogen (N) Oxygen (O) Phosphorus (P) Sulfur (S)
Answer:
Phosphorus
Explanation:
hen looking at a cell model, the dots on the endoplasmic reticulum represent-A. golgibodies B. ribosomesC. nucleiD. lysosomes
Answer:
I'm pretty sure it's ribosomes
Explanation:
because the endoplasmic reticulum is where proteins are packaged and made
Question 3 of 10
The bonds of the products store 22 kJ more energy than the bonds of the
reactants. How is energy conserved during this reaction?
A. The surroundings absorb 22 kJ of energy from the reaction
system.
B. The reaction uses up 22 kJ of energy when bonds break.
C. The reaction system absorbs 22 kJ of energy from the
surroundings.
D. The reaction creates 22 kJ of energy when bonds form.
Answer: The answer is C. The reaction system absorbs 22 kJ of energy from the surroundings.
Explanation: I just took the quiz and it said I got it right.
As per the law of conservation of energy:
C. The reaction system absorbs 22 kJ of energy from the surroundings
Law of conservation of energy:This law of energy states that the energy remains conserved its neither created nor destroyed. It remains conserved throughout the reaction.
when an amount of heat gets absorbed during the reaction from the surroundings this type of reaction is known as an endothermic reaction.
So, for fulfilling law of conservation, same amount of energy must be asborbed.
Thus, option C is correct.
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18 g of oxygen reacts completely with 4 g of hydrogen we would expect how many grams of water
A. Less than 22 grams
B. More than 22 grams
C. 22 grams because mass cannot be created or destroyed
D. There is no way to tell by this information
Answer:
C. 22 grams because mass cannot be created or destroyed
Explanation:
In this reaction and in any chemical reaction, mass is expected to always be conserved.
According to the law of conservation of matter "in a chemical reaction, matter is neither created nor destroyed but can be changed from one form to another".
Based on this law, the mass of reactants and products must be the same in a chemical reaction. So, the sum of the mass of the reactants must be equal to the mass of the product.An unknown solution has a pH of 7. How would you classify this solution?
What does the entropy of a reaction describe?
Answer:
entrophy is a measure of the degree of randomness or disorder of a system
Answer:
The amount of randomness in a system.
Explanation:
took test
Who was the first person credited with developing an atomic theory based on the results of experiments?
Answer:
John Dalton, an English chemist and meteorologist, is credited with the first modern atomic theory based on his experiments with atmospheric gases.
I need help on this question really bad
Answer:
Fungi, or D
Explanation:
Which of the following best describes the particles in an atom?
Answer:
Electrons move around a nucleus.
Explanation:
how many sig figs are in the measurment 10010m
Answer:
5
Explanation:
They all matter unless it is a decimal.
In Universe L , recently discovered by an intrepid team of chemists who also happen to have studied interdimensional travel, quantum mechanics works just as it does in our universe, except that there are four d orbitals instead of the usual number we observe here. Use these facts to write the ground-state electron configurations of the third and fourth elements in the first transition series in Universe L .Note: you may use X to stand for the electron configuration of the noble gas at the end of the row before the first transition series.
Answer:
See explanation
Explanation:
The third and fourth elements in the first transition series are vanadium and chromium. They contain 23 and 24 electrons respectively.
In universe L, the electron configuration of vanadium is;
[X] 3d3 4s2
In universe L, the electron configuration of chromium is;
[X] 3d4 4s2
The electron configuration of chromium has to change since there are four instead of five d orbitals in universe L.
Describe the relationship of organism With the environment
What is the Lewis dot diagram structure for PI2F
Answer:
Please find attached the completed Lewis dot diagram structure for PI₂F
Explanation:
The number of valence electrons are;
Phosphorus = 5 Electrons
Iodine = 2 × 7 electrons = 14 electrons
Chlorine = 7 electrons
The total number of valence electrons = 14 + 7 + 5 = 26 electrons
2) We draw the symbol that represents the basic (general) structure of the molecule as follows;
The sheared electron pair are represented by single bond lines
3) We complete the octet structures round the fluorine and the iodine atoms as attached showing 18 electrons plus 6 shared electron pairs, with a maximum from step 2 to give a total of (18 + 6) 24 electron pairs
4) We add the 2 unaccounted valence electron on the phosphorus atom to give it the stable octet structure, which gives the completed Lewis structure
carbon dioxide and water vapor are variable gases because
Answer:
Their amount is not consistent at all parts of the atmosphere
Explanation:
Carbon dioxide and water vapor exists as variable gases in the atmosphere because their amount varies from one part to the other.
The abundance of variable gases is influenced strongly by activities from the surface. This variability occurs a result of the contribution from from life activities on the surface. Also, due to properties of the gases, they are not evenly distributed. At certain altitudes, the amount of water vapor can be low.Carbon dioxide and water vapor are variable gases because their amount is not consistent at all parts of the atmosphere.
Surface activities have a significant impact on the abundance of variable gases.This variation arises as a result of the input of surface life activities.They are also not uniformly dispersed due to the characteristics of the gases.Water vapor levels might be low at particular heights.Carbon dioxide and water vapor are variable gases because their amount is not consistent at all parts of the atmosphere.For more information:
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Which statement correctly describes a reaction in dynamic equilibrium?
Answer:
The answer is B - At dynamic equilibrium, the reactions continue but the amounts of reactants and products do not change.
Explanation:
got it right on Edge
How does panting help the dog maintain homeostasis?
Panting helps the dog maintain homeostasis because panting is the equivalent of humans sweating. Dogs pant to cool themselves down to reachieve their "normal" body temperature. Homestasis is the individuals sense of equilibrium and a dog panting helps them to acheive their temperature homeostasis.
Which element will gain only one electron during a chemical reaction?
1. nitrogen
2.chlorine
3.carbon
4.oxygen
Answer:
nitrogenExplanation:
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Calcium carbonate, CaCO3, decomposes when heated to
calcium oxide (Cao) and carbon dioxide (CO2). If 100 g of
calcium carbonate is allowed to decompose, 56 g of calcium
oxide is produced. What mass of carbon dioxide is produced
by the decomposition?
Answer:
Approx. 80.g
80
⋅
g
Explanation:
We need a stoichiometric reaction that represents the decomposition of calcium carbonate:
C
a
C
O
3
(
s
)
+
Δ
→
C
a
O
(
s
)
+
C
O
2
(
g
)
↑
⏐
And thus calcium oxide and calcium carbonate are present in equimolar amounts:
Moles of calcium oxide
=
44.5
⋅
g
56.08
⋅
g
⋅
m
o
l
−
1
=
0.794
⋅
m
o
l
.
Given the stoichiometry of the reaction, an equimolar quantity of calcium carbonate MUST have been present.
This represents a mass of
0.794
⋅
m
o
l
×
100.09
⋅
g
⋅
m
o
l
−
1
≅
80
⋅
g
In the decomposition reaction, what does the
Δ
symbol represent?
Explanation:
44 gm mass of carbon dioxide is produced by the decomposition.
What is meant by Decomposition reaction?
Chemical species disintegrate into more straightforward components during decomposition events. Energy input is typically required for decomposition reactions.
For instance, the thermal breakdown of potassium chlorate (KClO3) is a typical method for creating oxygen gas in laboratories.
Calculations:
CaCO3 → CO2 + CaO
depending on the conservation of mass
mass of the product = mass of the reactant
100 g = ( X + 56 )
mass of CO2 = 100 - 56
= 44 g
Thus, 44 gm mass of carbon dioxide is produced by the decomposition.
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a- If an Lithium (atomic number 3) atom has a -2 charge, how many electrons does it have? b- Why do you do it this way? c- Is this an anion or a cation? d- Why? (4 points)
Answer:
5
Explanation:
A lithium atom with an atomic number of 3 and a charge of -2 will have a total number of electrons.
The atomic number is the number of protons in an atom. For a neutral atom that has not gained or lost electrons, the atomic number is the same as the number of electrons.
neutral atom: atomic number of electrons
For neutral atom of lithium, we will have 3 electrons
Now, lithium with a charge of -2 has gained two more electrons to the original 3 this now makes it 5.
ii.
It is an anion because it is negatively charged.
Negatively charged particles are called anion.
Molecules that are too large to flow across the
membrane need help from what structures?
Answer:
Some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic core. In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.
Molecules that are too large to flow across the membrane need help from integral proteins.
Some molecules are too large to diffuse through the membrane channels and too lipid insoluble to diffuse through the phospholipid layer.
Such is the case with glucose and some other monosaccharides,these substances, however, can cross the plasma membrane through the facilitated diffusion process.
The transport of these molecules depends on integral membrane proteins that act as transporters, transferring the molecules to one side of the membrane and the other without coming into contact with its hydrophobic interior.
Intrinsic or integral proteins constitute more than 70% of the total and are totally or partially included within the lipid matrix of the membrane maintained by hydrophobic interactions.
When they are arranged along the membrane, they are called transmembrane, they can pass totally or partially through the bilayer, sticking out one or both of its surfaces.
There are pores and channels in the membrane to pass substances to the interior and exterior of the cells formed by transmembrane proteins.
The passage of ions through ion channels is faster than through "carrier" proteins, since it does not require the union of the ion with the pore protein.
Therefore, we can conclude that molecules that are too large to flow across the membrane need help from integral proteins.
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Question 1 of 10
Match the term in Column 1 to the corresponding statement in Column 2.
BRUH CAN SOMEONE HELP!?!?!?
relationship between genes chromosomes an dna .
Answer:
Genes are segments of DNA that contain the code for a paticular protein that works in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.
Explanation:
Answer:
The answer should be A
Explanation:
