Answer:
The correct option is C.) static charge
Explanation:
Rubbing certain objects together, such as an amber bar with a bar covered with wool or skin, resulted in small charges that attracted small iron objects. By rubbing the bars together for a long time, it could cause a spark to appear.
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A) Metallurgy
I hope this one is the correct one , its been a while sine I did history .
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(1) +1 (3) +3
(2) +2 (4) +4
The oxidation state of nitrogen in NaNO2 is +3. This figure is calculated by balancing the charges in the molecule to zero, with sodium assigned +1 and oxygen assigned -2 as their oxidation states.
The oxidation state of an element in a compound refers to the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic. For NaNO2, the sodium (Na) has an oxidation state of +1, and the oxygen (O) has an oxidation state of -2 each. The molecule is neutral, with charge of zero. Thus, if we let x represent the oxidation state of nitrogen (N), we set up the equation:
+1 + x + 2(-2) = 0
Solving for x gives us:
x = +1 - 2*(-2) = +3.
So, the oxidation state of nitrogen in NaNO2 is +3.
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magnesium
sodium
sugar
A fundamental object that is difficult to divide into smaller bits is known as an element. An element is a substance that cannot be broken down by non-nuclear reactions in chemistry and physics. The elements are boron and oxygen, and their numbers are 1 and 2.
A pure material known as an element is made up of just one type of atom and cannot be divided into two or more different substances. A compound is a pure substance that is created when two or more substances are mixed in a specific mass ratio.
Chemistry's fundamental building block is an atom. It is the smallest fraction of matter into which electrically charged particles cannot be released. It is also the smallest piece of substance with chemical element-like characteristics.
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Sodium has 11 electrons, and in its ground state, 8 of these electrons are located in the second principal energy level.
The total number of electrons in the second principal energy level of a sodium atom in the ground state can be determined by understanding the electron configuration of sodium.
Sodium (Na) has an atomic number of 11, which means it has 11 electrons. In the ground state, these electrons are distributed in various energy levels. The second principal energy level, often denoted as n=2, can hold a maximum of 8 electrons. The first energy level, n=1, can hold a maximum of 2 electrons.
To find the number of electrons in the second energy level, we first fill the first energy level with 2 electrons and then place the remaining 9 electrons in the second energy level. However, since the second energy level can only hold 8 electrons, sodium's electron configuration in the ground state is 2-8-1, where 2 electrons are in the first energy level, 8 electrons are in the second energy level, and 1 electron is in the third energy level.
So, there are 8 electrons in the second principal energy level of a sodium atom in the ground state.
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A: Scientists have not yet gotten a fusion reaction to happen on Earth.
B: Per gram of fuel, fission releases more energy than fusion.
C: The energy from fusion cannot yet be converted to electricity.
D: Fusion requires conditions that use too much energy to maintain.
According to the nuclear fission and nuclear fusion reactions,energy from fusion cannot yet be converted to electricity.
There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.
In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.
In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.
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