Write an equation that shows the formation of a selenide ion from a neutral selenium atom
Answers
Answer:
Se + 2e- => Se-2
Explanation:
Ions are electrically charged particles, formed due to the gain or loss of electrons by an atom.
There are two types of ions cations and anions. An element that loses their electrons and forms positive ions are cations while metals and element that gains one or more electrons and forms negative ions are anions.
Selenium is an atom with atomic number 34 and represented as Se. The electronic configuration of Se is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4. Selenium will gain 2 more electrons to complete it p orbital and form an ion Se-2.
The equation is as below:
Se + 2e- => Se-2
Related Questions
A protein made up of 125 amino acids contains an isoleucine residue at position 54 in its polypeptide chain. which amino acid could be substituted for this isoleucine and be expected to cause the least disruption in the protein's three-dimensional structure?
Dalton’s Law CalculationA mixture of H₂, N₂ and Ar gases is present in a steel cylinder. The total pressure within the cylinder is 675 mm Hg and the partial pressures of N₂ and Ar are, respectively, 354 mm Hg and 235 mm Hg. If CO₂ gas is added to the mixture, at constant temperature, until the total pressure reaches 842 mm Hg, what is the partial pressure, in mm Hg, of the following?A) CO₂, 167 B) N₂, 354 C) Ar, 235 D) H₂, 8629
Which of the following sets of characteristics describe what we know about the inner planets?Select one: a. They are closest to the sun, have many moons, and include ring systems. b. They are closest to the sun, have many moons, and include ring systems. c. They have rocky surfaces, no rings, and few or no moons. d. They have rocky surfaces, ring systems, and are larger in size.
Liquids and solids are left out of the equilibrium constant expression because their concentrations remain constant during reactions. What is the molarity concentration of liquid water at 25.0 LaTeX: ^\circ ∘C given that its density is 0.997 g/mL at that temperature? a.23.5 M b.0.997 M c.0.180 M d.0.156 M e.55.3 M
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Answer: ending results
Explanation:
Final answer:
The results of an investigation are the observations and data collected during an experiment or research, which may be qualitative or quantitative. For example, the results of a plant growth experiment could include measurements and descriptions of the plants under different light conditions.
Explanation:
The results of an investigation are the findings obtained from carrying out an experiment or research. An investigation seeks to answer a question, test a hypothesis, or solve a problem. The results constitute the data collected and analyzed, which may be quantitative (numerical) or qualitative (descriptive) in nature. For example, if you conduct an investigation to determine the effect of light on plant growth, your results might include measurements of plant height, color intensity, and a description of leaves condition at different light exposures.
Learn more about Investigation Results here:
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is this?
This is a conversion.
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Answer:
Explanation:
Given
Required
Convert to meters per minutes
Start by converting the speed from miles to meters
So, we have:
Next, we convert time from hours to minutes
So, we have:
Hence, the equivalent of 25 miles per hour is 670.56 meters per minutes
Answers
With this "sea of electrons" electrical current, which is a flow of electrons, is best explained because the electrons in a metal are already "flowing" around every metal atom in the crystal and can then freely flow through the metal. it's the same thing with heat. because the electrons are 'free' in metallic compounds and shared by all metal atoms, heat is transferred just as well. Malleability and ductility are explained by this because even though metals are relatively dense, they aren't so dense that they cannot be made to be closer together. because the outer electrons are not rigidly held in place by nuclear charge or strict crystal structure, metals are easily, some more than others, pounded into shape or drawn into wire.
Electron sea model: Electrons all have approximately the same energy.
Band theory: Electrons move among orbitals of different energies.
Both models: Electrons move freely among atoms (delocalized).
is the answer on edgeunuity
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Answers
Answer: The given statement is true.
Explanation:
When solid state of water changes directly into vapor state then this process is known as sublimation.
For example, when dry ice is placed at room temperature then it converts into vapor state without undergoing liquid state.
Also when we apply very high pressure or temperature at the solid state of water, it will change directly into vapor state.
Therefore, the statement ice does not need to melt into liquid water before it can return to the atmosphere as water vapor is true.
Because if it has a high pressure, it can skip the liquid phase. The process is called sublimation.
A. outer core.
B. outer mantle.
C. asthenosphere.
D. lithosphere.
Answers
lithosphere (its a part of the Crust)