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Andrews [41]
3 years ago
15

Why does it make sense that Hydrogen and Helium would be the first elements to form in the Universe?

Chemistry
1 answer:
Illusion [34]3 years ago
8 0

Answer:

Explanation:

It makes sense because Helium and Hydrogen only hold 1 and 2 subsequent protons/neutrons and electrons. When the Big Bang happened the entire universe was so hot that it was impossible for elements to form since it was impossible for electrons to stay bound to the atoms. After a few seconds the universe began to cool enough for electrons to bond to atoms and create different elements. Since Helium and Hydrogen have 1 and 2 electrons subsequently we can assume that they were the first elements to be created. Also they are the most abundant elements in the Universe which backs up this theory.

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According to this Bohr model, in what period would this element be found?
Tasya [4]

Answer:

yes

Explanation:

yes

4 0
3 years ago
Which topic is commonly used to explain activation energy and how chemical reactions happen
castortr0y [4]
The correct answer is collision theory
6 0
4 years ago
Read 2 more answers
A chemist has one solution that is 25% salt and 75% water and another solution that is only 5% salt. how many milliliters of eac
Arte-miy333 [17]
The formula that we will be using is:

total salt / total solution = .10
Let a be the ml of the first solution

And let b be the ml of the second solution
.25a + .05b / a + b = .10
Also:

a + b = 1400

a = 1400 - b
So substitute:
.25 x (1400 - b) + .05b / 1400 = .10

350 - .25b + 0.05b/ 1400 = .10

350 - .2b / 1400 = .10
350 - .2b = .10 x 1400

.2b = 350 - 140

.2b = 210

b = 1050

a = 1400 - b

a = 1400 - 1050

= 350 mL
3 0
3 years ago
Suppose a star is undergoing a nuclear reaction. What happens to the elements around the star as it begins to emit more and more
AlladinOne [14]
I think the correct answer would be the third option. As the elements around the star begins to emit more and more electromagnetic radiation, the rocky materials are pulled in by the electromagnetic radiation. They are being drawn closer to the star and there would be a very high chance of a nuclear fusion could happen. The pressure and the temperature in a star is so high that it could allow nuclear fusion to happen. As a matter of fact, most of the life of a start is made from hydrogen nuclei fusing together forming a helium nuclei. As it runs out of the hydrogen nuclei, it would fuse other nuclei forming other elements.<span />
3 0
4 years ago
Read 2 more answers
ATP + H2O -----&gt; ADP + Pi + energy
NeTakaya

Answer: Hydrolysis

Explanation:

ATP + H2O -----> ADP + Pi + energy

The above reaction is known as ATP hydrolysis.

The energy molecule Adenosine Triphosphate is broken down to Adenosine Diphosphate and phosphate group. Hydrolysis reaction of ATP is accompanied with the release of energy. This energy is used to perform cellular work.

Hydrolysis reaction is a Catabolic reaction

Hydrolysis: hydro -water ; Lysis means break

Hydrolysis means break a compound using water

3 0
4 years ago
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