What element has the electron configuration of 1s2 2s2 2p6 3s2 3p2?
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The element with the electron configuration 1s² 2s² 2p⁶ 3s² 3p² is silicon (Si).
In the electron configuration notation, each number and letter represents a specific energy level (or shell) and subshell that contains electrons in an atom. The numbers indicate the energy levels (principal quantum numbers), and the letters represent the type of subshell (s, p, d, or f).
Let's break down the electron configuration for silicon (Si):
1s²: This indicates that the first energy level (n = 1) has two electrons in the s subshell.
2s²: This indicates that the second energy level (n = 2) has two electrons in the s subshell.
2p⁶: This indicates that the second energy level (n = 2) has six electrons in the p subshell.
3s²: This indicates that the third energy level (n = 3) has two electrons in the s subshell.
3p²: This indicates that the third energy level (n = 3) has two electrons in the p subshell.
To find the element with this electron configuration, we count the total number of electrons: 2 + 2 + 6 + 2 + 2 = 14 electrons. Since silicon (Si) has 14 electrons, it matches the given electron configuration.
Silicon is a chemical element in the periodic table with atomic number 14. It is a metalloid, meaning it has properties of both metals and nonmetals. Silicon is widely used in various industries, including electronics, as it is a key component of semiconductors and is crucial for modern technology.
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The element is Silicon 14 Si
hope this helps!
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(1) Ionic bonds are broken.
(2) Ionic bonds are formed.
(3) Energy is converted to mass.
(4) Mass is converted to energy.
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electron; proton
proton; electron
proton; neutron
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Answer : Option D) Proton and Neutron.
Explanation : The part of the atom that carries a positive charge is the proton, and the part that carries a neutral charge is the neutron.
A proton is a small subatomic particle, denoted by symbol , with a positive electric charge of +1 e elementary charge and a mass which is slightly less than that of a neutron. It is located at the center o atomic nucleus along with neutron. The number of protons are equal to the number of electrons of that atom but are in opposite charges.
A neutron is a subatomic particle of an atom which is of the same mass as that of proton but without an electric charge, it is present in all atomic nuclei except those of ordinary hydrogen. It is also located at the center of an atomic nucleus.
Protons have a positive charge
Neutrons are neutral
Electrons have a negative charge :)
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b. will be easily separated.
c. lose their own properties.
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Explanation:
Conductors and insulators are two types of materials that differ in their ability to conduct electrical current. Here are the key differences between conductors and insulators:
**Conductors:**
1. **Electrical Conductivity:** Conductors are materials that have high electrical conductivity. This means they allow the easy flow of electric charge, typically in the form of electrons. Metals like copper, aluminum, and silver are excellent electrical conductors.
2. **Free Electrons:** Conductors have a large number of free electrons that are loosely bound to their atomic structure. These free electrons can move easily when a voltage is applied, creating an electric current.
3. **Low Resistance:** Conductors have low electrical resistance, which means they offer little opposition to the flow of electric current.
4. **Used for Wiring:** Conductors are commonly used in electrical wiring and circuits to transmit electricity efficiently.
**Insulators:**
1. **Electrical Insulation:** Insulators are materials that have low electrical conductivity. They do not allow the easy flow of electric charge. Examples of insulators include rubber, glass, plastic, and wood.
2. **Tightly Bound Electrons:** Insulators have tightly bound electrons in their atomic structure. These electrons are not free to move, so they do not contribute to the flow of electric current.
3. **High Resistance:** Insulators have high electrical resistance, which means they strongly resist the flow of electric current.
4. **Used for Insulation:** Insulators are used to isolate and protect conductors in electrical systems. They are employed as insulating materials in wires, cables, and electrical devices to prevent electrical leakage and ensure safety.
In summary, conductors allow electric current to flow easily due to the presence of free electrons and low resistance, while insulators inhibit the flow of electric current because their tightly bound electrons and high resistance prevent the movement of charge. These differences make conductors suitable for carrying electricity, while insulators are used to insulate and protect conductive materials in electrical systems.
b. The mass of the Carbon-14 sample is greater than the Carbon-12 sample, but the reactivity of both samples was the same .
c. The reactivity of the Carbon-14 sample is less than the Carbon-12 sample, but the mass of both samples was the same.
d. The reactivity of the Carbon-14 sample is greater than the Carbon-12 sample, but the mass of both samples was the same.
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Answer:
B.
Explanation:
Correct: b. The mass of the Carbon-14 sample is greater than the Carbon-12 sample, but the reactivity of both samples was the same .
- C-14 has two additional neutrons, so is heavier than C-12. The chemical properties will be the same, however.