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11111nata11111 [884]
3 years ago
15

One isotope of a non metallic element has a mass number of 127 and 74 neutrons whats the symbol

Chemistry
2 answers:
sleet_krkn [62]3 years ago
8 0

Answer: Iodine

Explanation: When you subtract 127 by 74, you find out the atomic number (number of protons) and then simply check your periodic table which gives shows Iodine with an atomic number of 53 and an atomic mass of 126.90 which rounds to 127.

Svetach [21]3 years ago
4 0

Answer:

Iodine

Explanation:

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Which of the following statements regarding hydrogen bonding in secondary structures is true? Group of answer choices Both α-hel
frozen [14]

Answer:

The correct answer is "α-helices only use intrachain hydrogen bonds and β-sheets can use either intrachain or interchain hydrogen bonds".

Explanation:

Hydrogen bonding are essential forces for the formation of the secondary structures of proteins. The alpha helix is a coiled secondary structure that is stabilized only by intrachain hydrogen bonds, which are formed between the NH and CO groups of the main chain. On the other hand,  β-sheets can use either intrachain or interchain hydrogen bonds for its stabilization. Adjacent chains in β-sheets can run either in the same or opposite directions, which are stabilized by interchain hydrogen bonds.

5 0
4 years ago
Can an object move by itself explain the answer
cricket20 [7]

Answer:

nope

Explanation:

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3 0
3 years ago
e average bond order is the number of bonds between two atoms taking into account resonance. Draw a Lewis structure for ozone an
sineoko [7]

Answer:

See Explanation

Explanation:

Resonance is a valence bond terminology which is used to describe a situation in which a single structure is not able to fully describe the nature of bonding in a molecule.

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The real structure of the molecule is somewhere in between these structures -  a resonance hybrid.

For ozone, two equivalent structures can be used to describe the bonding in the molecule. These structures are equivalent as shown in the mage attached. We can see from these structures that the bond order in ozone is 1.5(one and half bonds)

5 0
3 years ago
PLEASE HELP
kondaur [170]

Answer:

C

Explanation:

4 0
3 years ago
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Viefleur [7K]

Answer:

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Explanation:

It is because the group number is equal to the valence electron.

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