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yan [13]
3 years ago
13

How many neutrons are in the radioactive isotope 40/19? A. 40 B. 19 C. 21 D. 20

Chemistry
2 answers:
nydimaria [60]3 years ago
7 0

The answer to this question is B 19

Olin [163]3 years ago
5 0
The answer is B. 19 <span>✔

Its 19 because h</span><span> (atomic mass is4.02643(11) u) contains one proton and three </span>neutrons<span> in its nucleus. It is a highly unstable </span>isotope<span> of hydrogen. It has been synthesised in the laboratory by bombarding tritium with fast-moving deuterium nuclei.</span>
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Which is a physical property of milk
puteri [66]

Answer:

The principal physical properties of milk include its density, redox properties, colligative properties, surface activity buffering capacity, rheological behaviour, conductivity, thermal properties and color.

Explanation:

5 0
3 years ago
Read 2 more answers
Why potasium more reactive than lithium and sodium
frez [133]
So potassium is more reactive than lithium because the outer electron of a potassium atom is further from its nucleus than the outer electron of a lithium atom. Hope this answers the question. Have a nice day. Feel free to ask more questions.
5 0
3 years ago
Which of the following is the abbreviation for a nucleotide containing the nitrogenous base cytosine, a hydrogen at the 2’ carbo
zvonat [6]

Answer:

dCDP

Explanation:

The nucleotide has hydrogen at it second carbon which means that it has deoxy pentose sugar which is written in small d as prefix.

The nitrogenous base is cytosine and it contains 2 phosphate groups which are attached to the 5 carbon of the pentose sugar means it is cytosine diphosphate.

<u>So, the abbrevation of the molecule is : dCDP</u>

4 0
4 years ago
What is carbonixation ​
nydimaria [60]

Answer:

This has some interesting History in it.

Peat moss was once pounded into a sort of brick; sometimes with a little coal, these bricks were put to dry, and used for fuel.

The “Historical” part is in the name. I won’t go into why, ‘cause I type so slow and it is “extra”, but the peat, or coal, being TRULY organic, (that is made from plants) and burned as fuel is called “carbonixation”.

Explanation: Sort of a “Carbon + Oxidation”; many things in Chemistry have strange names that seem at first to make no sense; like “essence of Hartshorn”, is Ammonia (or ammonium hydroxide). A Hart is/was a type of deer in England and that area, and amines in the horn, when distilled, would yield Ammonia, “The Essence of Hartshorn”. Even the term “aromatic” has a long History, as do many compounds and nomenclature.

I hope that will do it.

8 0
3 years ago
How many joules are required for melting 12.8g of ice at 0 degrees Celsius?
tino4ka555 [31]

Answer:

4,270 Joules

Explanation:

The heat of fusion of water is 334 j/g. So, the equation would be (12.8 g)(334 j/g) which comes to 4,270 joules.

Written out that's just twelve point eight times three hundred and thirty four.

4 0
3 years ago
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