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lyudmila [28]
3 years ago
11

Can elements be broken down into simpler substances?

Chemistry
1 answer:
andreev551 [17]3 years ago
7 0
Straight from my textbook: "They were putting substances together to form new substances and taking substances apart to find out what they were made of. They found that certain substances couldn't be broken down into simpler substances. Scientist called these substances elements." So the answer to you question is no, elements cannot be broken down into simpler substances.
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Typical frequencies for several types of electromagnetic radiation are given below. Calculate the energy of each type of radiati
marusya05 [52]

Explanation:

The energy of electromagnetic radiation is given by :

E=h\nu

Where, h is the Planck's constant

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Energy,

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(b) A microwave, \nu = 4.95\times 10^{10}\ Hz

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E=6.63\times 10^{-34}\times 4.95\times 10^{10}\\E=3.28\times 10^{-23}\ J

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Energy,

E=6.63\times 10^{-34}\times 2\times 10^{6}\\E=1.32\times 10^{-27}\ J

Therefore, this is the required solution.

4 0
3 years ago
A scientist claimed that he radiocarbon dated a fossilized skull of a dinosaur and found it to be about 63 million years old. Do
Elodia [21]

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5 0
3 years ago
What is the charge of an atom after it gains an electron during the formation of a bond?
Alex_Xolod [135]

Answer:

<em>D. One negative charge</em>

Explanation:

During the formation of a bond, if an atom gains an electron, after that it will be left with a negative charge compared to the atom before the bond is formed. This is because in these types of bonds, which are <em>ionic bonds</em>, there is a <em>transfer of electrons between atoms</em>, there will be one or more atoms that yield electrons that will be captured by another and other atoms that gain them, and the difference of charges produced by this transfer of electrons, will cause the union to occur due to the attraction between electrostatic forces.

If you have a neutral atom before joining, and it gains an electron to form a bond,<em> it will have one electron more than its initial state</em> (in the initial state, the number of protons and electrons is the same, because the atoms they are electrically neutral), so having an extra electron will make it have a negative charge, since there will be a difference between the number of protons and electrons that the atom possesses. <em>This is why the correct answer is D. </em>

In the case of <em>response A and B</em>, <em>the atom could only remain positively charged if it loses electrons</em>, but as in this case it wins, <em>they are not correct</em>.

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7 0
3 years ago
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mart [117]

a.) Asp and Lys

Asp will elute first from the column because it has less positively charged functional groups than Lys.

 

b.) Arg and Met

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c.) Glu and Val

Glu will elute first from the column because it has more negativity functional groups than Lys and will be not be much retained by the -SO₃⁻ groups from the ion-exchange coloumn.

d.) Gly and Val

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e.) Ser and Ala

Ser will be eluted first from the column because Ala alkyl chain will be more attracted by the strongly hydrophobic backbone for the resin. Ser have an -OH group which will decrease the hydrophobicity of the alkyl chain and will not be so much retained on the column.

7 0
3 years ago
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