What are three types of fossil fuels?
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You heat a piece of iron from 200 to 400 K What happens to the atom's energy of random motion
Click on the diagram to choose which atom is more reactive.
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is the energy needed to raise an electron in the hydrogen atom from the second energy level to the third energy level.
What are Energy Levels?
The electrons that surround an atom around the nucleus are located in regions called "energy levels". It represents the 3-D space that surrounds the nucleus where the electrons are present. It is divided into several energy levels such as first energy level, second energy level and so on.
The level that is closest to the nucleus is the first energy level, then the second one is further away from it, then the third one is a little further away and so on. Each energy level has different number of electrons like first has 2 electrons, second has 8, third has 8 and so on. The electrons which are further away from the nucleus are called valence electrons.
For given above information,
E = - /
where,
= 13.6 eV (1 eV = 1.602×10-19 Joules) and n = 1,2,3… and so on so that the ground state has energy
= -13.6 eV and the second energy level (the first excited state) has energy
= -13.6/4 eV = -3.4 eV.
So,
1eV = 1.602×J
Energy difference can be calculated by -13.6eV (-
)
= Final energy;
= Initial energy
1.88 eV is equals to x
So, x= 3.03*
Thus, is the energy needed to raise an electron in the hydrogen atom from the second energy level to the third energy level.
Learn more about Energy Level, here:
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(1) Receptor: where stimulus action is.
(2) Sensory Neuron: responisble of transmitting afferent impulses to the central nervous system.
(3) Integration Center: Sensory impulse to motor impulse; Direct (monosynaptic) or polysynaptic region in CNS.
(4) Motor Neuron: Efferent impulses from integration center to effector.
(5) Effector: Muscle fiber or gland cell that responds to the efferent impulses.
Answer:
1. Receptor: where stimulus action is.
2. Sensory Neuron: responsible of transmitting afferent impulses to the central nervous system.
3. Integration Center: Sensory impulse to motor impulse; Direct (monosynaptic) or polysynaptic region in CNS.
4. Motor Neuron: Efferent impulses from integration center to effector.
5. Effector: Muscle fiber or gland cell that responds to the efferent impulses.
B. receptor, sensory, interneuron, motor, effector
TRUE
FALSE
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Answer:
False
Explanation:
A crystalline solid has a well ordered structure. The particles that make up the solid are arranged in a regular repeating pattern. When the solid is heated, this structure gives way, in order words, the solid melts.
Pure solids crystals are known to have sharp melting points. This is a property of crystalline solids.
The statement about “Crystalline solids do not have a sharp melting point” is false. Crystalline solids are solids that have particles arranged in a regular, repeating patterns. They are held together by uniform intermolecular forces. The faces intersect at a specific angle that identifies that substance. They have distinctive internal structures that in turn lead to distinctive flat surfaces. These flat surfaces give a short rage order. When exposed to x – ray diffractometers, they exhibit a distinctive pattern used to identify the material. They give the same face when you turn a crystalline solid around
b. Water can dissolve nonpolar covalent compounds through hydrogen-bonding interactions.
c. Water can dissolve polar covalent compounds through ion-dipole interactions.
d. Water can dissolve nonpolar covalent compounds through dipole-dipole interactions.
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Answer:
a. Water can dissolve polar covalent compounds through dipole-dipole interactions.
Explanation:
It's the correct answer on Edge 2021. If anyone asks, you didn't hear it from me ;)