Each atom in the bond contributes one valence electron, forming a shared pair in a single covalent bond. electrons that are valence electrons of the atom. Two valence electrons are lost by Sr when forming SrI[tex]_2[/tex].
What is valence electron?A valence electron is an electron that is part of an atom's outer shell in chemistry and physics. If the outer shell is open, the valence electron can take part in the creation of a chemical bond.
The electrons in the s and p orbitals are those that are in question. Core electrons are those found in the inner shell. These electrons are vital to the majority of chemical processes because they have higher energy than the electrons in inner orbits. The electrons farthest from the nucleus are the electrons that are valence electrons of the atom. Two valence electrons are lost by Sr when forming SrI[tex]_2[/tex].
Therefore, two valence electrons are lost by Sr when forming SrI[tex]_2[/tex].
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What causes streams to form?
O absorption
O precipitation
O glaciers
O lakes
Answer: essay the answer is B: precipitation
Explanation:
How many different types of atoms are in the formula Ba(OH)2 • 8H2O?
A)3
B)2
C)11
D)22
carbon reduction process is not applied for extraction of alkali metal . why ?
Answer:
The alkali metals are the highly electropositive metals. Highly electropositive metals cannot be extraction carbon reduction process, because these metals do not react with carbon
Explanation:
Describe the nucleus of the
atom.
Answer:
The nucleus of atom is composed of two subatomic particles that each have charges.
Protons, which are positively charged particles.Neutrons, which are neutrally charged particles.Both reside in the nucleus of an atom. The amount of protons and neutrons (Electrons can to) is what helps us identify each atom apart. Electrons are NOT in the nucleus of atom but orbit it in outer layers called orbitals.
can anyone tell me "what are the exceptions of law of reciprocal proportions??"
The electron configuration for Helium (He) is shown below.
1s2
Which diagram shows the correct distribution of electrons in the electron shells of a helium atom?
Answer:
3rd image
Explanation:
According to the chart, very few elements are required for our planet to exist in its current state. Analysis of the chart would lead an observer to conclude that
our planet is exists in its unique state solely because of the element carbon
our planet is mainly composed of hydrogen
our planet is mainly composed of a few key elements, but other elements are present as well
our planet is composed of 92 naturally occurring elements
Answer:
the 3rd answer
Explanation:
the earth is composed of key element like carbon Oxygen nitrogen phosphorus hydrogen and sulphur CHNOPS but they are other element on earth too even though they are not as essential
đơn chất nào sau đây tác dụng với dung dịch axit sunfuric loãng sinh ra khí ?
a đồng
b cacbon
c nhôm
d lưu huỳnh
Answer:
C. Al
Explanation:
2Al+ 3H2SO4(l)------> Al2(SO4)3+ 3H2
What is activation energy
Answer: Activation energy is defined as the minimum amount of extra energy required by a reacting molecule to get converted into product. It can also be described as the minimum amount of energy needed to activate or energize molecules or atoms so that they can undergo a chemical reaction or transformation.
Explanation:
Are we alone in the universe?
Answer:
no ofcourse not!
Explanation:
Answer:
no
Explanation:
the universe is way too big, maybe not in a conventional form but there are definitely aliens
Please help I will give brainliest ;3
Answer:
oxygen, carbondioxide
carbondioxide, oxygen
HEEELP PLEASE HELP ASAP WILL AWARD BRAINLIEST What is the IUPAC name for this compound?
Answer:
The Correct IUPAC name is H3C - CH (CH3) - CH (C2H5) - (CH2)2 - CH3 Class 11
Explanation:
yes searched np is maybe right i not 100% sure i 50% is it right >:) tell if u got it right >:D
Answer:
4-ethyl-6-methyl-3-heptene
Explanation:
Longest chain is seven long so it is heptane
But there is a double bond, so that becomes heptene
The double bound starts on the third carbon, so it is 3-heptene (this tells us where the double bond is)
Now we just got to do the substituents!
There is a ethyl group of the fourth carbon and then a methyl group on the sixth!
Ergo, 4-ethyl-6-methyl-3-heptene
Question
How are chemical equations balanced?
Answer:
According to the law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants. A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side
What is the mass of 1,300 cm of gasoline? The density of gasoline is 0.67 g/cm.
Answer:
Volume x Density = Mass of a substance
1300 x 0.67 = 871
The mass is 871 (unit)
How didMendeleev feel about Russian science education when he came back from Germany?
While he was researching and writing that book in the 1860s, Mendeleyev made the discovery that led to his most famous achievement. He noticed certain recurring patterns between different groups of elements and, using existing knowledge of the elements' chemical and physical properties, he was able to make further connections. He systematically arranged the dozens of known elements by atomic weight in a grid-like diagram; following this system, he could even predict the qualities of still-unknown elements. In 1869, Mendeleyev formally presented his discovery of the periodic law to the Russian Chemical Society.
Hope This is Ok :)
One of the few resources on Mars is
Answer:
iron .. titanium.. nickel....aluminum... sulfur... and calcium
____ are the forces of attraction between positive metal ions and the valence electrons that surround them.
The forces of attraction that exists between positive metal ions and their surrounding valence electrons is called: metallic bonds.
A chemical bond can be defined as the forces of attraction that exists between ions, crystals, atoms or molecules and they are mainly responsible for the formation of all chemical compounds.
In Chemistry, there are different types of chemical bonds and these are:
Hydrogen bonds.Covalent bonds.Ionic bonds.Metallic bonds.A metallic bond can be defined as the forces of attraction that exists between positive metal ions and their surrounding valence electrons.
This ultimately implies that, metallic bond are peculiar to positively charged metals but not negatively charged metals or non-metals.
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9) What is the final pressure in the container shown below after the valve is opened and the gases are allowed
to flow? (The gases do not act)
0
4.00 am
3.00
NE
2.00 am
2.00 L
A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.
We have 2 containers connected by a valve.
One container has a volume of 3.00 L and contains O₂ at 4.00 atm. The other container has a volume of 2.00 L and contains Ne at 2.00 atm.
When the valve is opened, the total volume is the sum of the 2 containers.
[tex]V_2 = 3.00 L + 2.00 L = 5.00 L[/tex]
Assuming constant temperature and ideal behavior, we can calculate the final pressure of each gas using Boyle's law.
O₂
[tex]P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{4.00atm \times 3.00L}{5.00L} = 2.40atm[/tex]
Ne
[tex]P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{2.00atm \times 2.00L}{5.00L} = 0.800atm[/tex]
The final pressure in the container will be the sum of the final pressures of the gases.
[tex]P = 2.40 atm + 0.800 atm = 3.20 atm[/tex]
A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.
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Ow is the relatively high melting point of sodium chloride related to its structure at the atomic scale? Observe sodium chloride crystals with a hand lens. Use your observations and the model of sodium chloride to support your claim.
Answer:
see explanation
Explanation:
How is the relatively high melting point of sodium chloride related to its structure at the atomic scale? Observe sodium chloride crystals with a hand lens. Use your observations and the model of sodium chloride to support your claim.
Unlike the raltively low melting point of water (100 °C), NaCl has a much higher melting point (801 °C),.
Theater molecules in ice are held together by hydrogen bonds, which are relatively weak.
The ions in NaCl are held together by ionic bonds, whose electrostatic ,force is much greater.
The crystal structure makes the force even greater.
imagine a chloride ionin a NaCl crystal.
It has Na ions in front, behind, to the left, to the right, above and below.
Likewise the Na ion has Cl ions in front, behind, to the left, to the right, above and below.
It takes a lot of energy to berak these bonds and temprature is a measure of energy.
if you try the experiment make certain you are undr a fune hood and wear protective loves and apron. 801 °C can seriously burn skin and clothing
The temperature at which the liquid and the solid of refined compounds and elements can occur stable and in equilibrium is called the melting point.
How are the structure and the melting point related?Water has a relatively lower melting point of 100 °C compared to [tex]\rm NaCl[/tex] at 801 °C which has a much higher melting point. The water molecules in ice are bonded jointly by somewhat weak hydrogen bonds.On the other hand, [tex]\rm NaCl[/tex] ions are bonded together by ionic bonds, that has a greater electrostatic force and its crystal structure produces the force to be even more prominent.When a sodium and chloride ion is imagined in the [tex]\rm NaCl[/tex] crystal the sodium ions are present above, below, left and right of the structure and the chloride ions are similarly placed in the crystal structure.This type of structure needs a lot of energy to break and hence the melting point of the salt is more compared to the water.
Therefore, the melting point is related to the structural organization of the atoms.
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c) ¿Qué ocurriría si tenemos disueltos 200 g de
nitrato de potasio en 300 g de agua a 60°C
y enfriamos la disolución hasta los 10 °C?
There is 200 grams of water on a stove. The water is currently 25 C. How much energy in joules must be used to raise the water to 90 C?
Answer:
q
=
64 kJ this is answer. .
How mang millimoles of solute are contained in 2.00L of 2.76×10^-3 M of KMnO4
Answer:
5.52
Explanation:
2.76 10^-3 M = 2.76mM
2.76mM*2L= 5.52mmol
How many grams of hydrogen are needed to fully react 621. 9 grams of nitrogen gas.
Answer:
9 grams of nitrogen gas
Explanation:
Which highway run through comlumbus
Answer:
Highway 22 ,GA 31820
Explanation:
Which set of laboratory equipment would most likely be used with a crucible
Answer:
That should be crucible tong
a brief description of atoms and how they relate to
molecules and compounds
Answer:
Explanation:
Atoms are the thing that make up molecules and compounds. Molecules contain two or more atoms and are held together by covalent bonds
What do the groups (columns) and periods (rows) tell you about the elements on the periodic table?
Answer:
Groups: The vertical column of the periodic table that signifies the number of valence electrons in an element.
Period: The horizontal rows in the periodic table that signify the number of electron shells in an element.
Explanation:
Answer:Groups: The vertical column of the periodic table that signifies the number of valence electrons in an element. Periods: The horizontal rows in the periodic table that signify the number of electron shells in an element.
Explanation:
The table has seven rows and 18 columns. Each row represents one period; the period number of an element indicates how many of its energy levels house electrons.The columns of the table represent groups, or families, of elements.
Which are effects of long-term exposure to mustard gas? Select all that apply. One, some, or all responses may be correct.
The effects of long-term exposure to mustard gas causes mortality and chronic respiratory disease.
Exposure to mustard gas in the long term can result in mortality from influenza, pneumonia as well as chronic breathing disease. Exposure for long term leads to respiratory complications and septic shock. Extensive breathing in the environment of mustard gas can cause chronic respiratory disease, respiratory infections or death.
Extensive eye exposure to this gas can cause permanent blindness. Exposure to mustard gas may also increase the chances of lung and respiratory cancer so we can conclude that mustard gas is lethal and can cause a number of diseases in a person who is exposed to it.
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Determinar el valor positivo de “m” para que la ecuación: x(x+2)=4mx−8 ; tenga una raíz que sea el doble de la otra.
El valor positivo de [tex]m[/tex] para que la ecuación [tex]x\cdot (x+2) = 4\cdot m \cdot x - 8[/tex] tenga una raíz que sea el doble de la otra es 2.
De acuerdo con el enunciado de esta pregunta, debemos encontrar un valor de [tex]m[/tex] a partir del siguiente sistema de ecuaciones:
[tex]r\cdot (r+2) = 4\cdot m \cdot r -8[/tex] (1)
[tex]2\cdot r \cdot (2\cdot r + 2) = 4\cdot m \cdot (2\cdot r) - 8[/tex] (2)
Ahora simplificamos el sistema de ecuaciones:
[tex]r^{2}+2\cdot r = 4\cdot m\cdot r - 8[/tex] (1b)
[tex]4\cdot r^{2}+4\cdot r =8\cdot m\cdot r - 8[/tex] (2b)
Despejamos [tex]m[/tex] en cada expresión, lo eliminamos y resolvemos el polinomio resultante:
[tex]\frac{r^{2}+2\cdot r + 8}{4\cdot r} = \frac{4\cdot r^{2}+4\cdot r +8}{8\cdot r}[/tex]
[tex]r^{2}+2\cdot r + 8 = 2\cdot r^{2}+2\cdot r +4[/tex]
[tex]r^{2}-4 = 0[/tex]
[tex]r^{2} = 4[/tex]
[tex]r = \pm 2[/tex]
Finalmente, determinamos el valor de [tex]m[/tex], que al ser positivo, debemos utilizar [tex]r = 2[/tex]:
[tex]m = \frac{2^{2}+2\cdot 2 + 8}{4\cdot 2}[/tex]
[tex]m = 2[/tex]
El valor positivo de [tex]m[/tex] para que la ecuación [tex]x\cdot (x+2) = 4\cdot m \cdot x - 8[/tex] tenga una raíz que sea el doble de la otra es 2.
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wht will react with acid to giv bluish green salt nd water ??
Explanation:
When dilute HCl is added to a small amount of copper oxide in a beaker, a greenish-yellow gas is released and a bluish-green solution is formed. Since the metal oxides such as a Copper oxide (CuO) are basic in nature, it reacts with acids such as HCl to form the corresponding salt and water.
