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jok3333 [9.3K]
4 years ago
9

The early universe was composed mainly of which two elements? hydrogen and helium carbon and oxygen hydrogen and oxygen carbon a

nd iron
Chemistry
2 answers:
mrs_skeptik [129]4 years ago
7 0
It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms. These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe.

Hope this will help you.
Pepsi [2]4 years ago
3 0

Answer:

c.

Hydrogen and Helium

Explanation:

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Draw the structure of ozone according to VSEPR theory. What would be its associated molecular geometry?
vodka [1.7K]

Answer: Ozone's molecular geometry can be described as bent.

Explanation:

The molecular geometry of the O3 groups has a trigonal planar arrangement.

Here is a quick explanation of the molecular geometry of O3 including a quick description of the O3 bond angles.

Examining the  Lewis structure of  O3 we can see that there are a pair of unbounded valence electrons at the top of the structure.

Based on VSEPR Theory (Valence Shell Electron Pair Repulsion Theory) these electrons will repel the electron clouds of the two oxygen atoms on the end.

As a result they will be pushed down giving the 03 molecule a bent molecular geometry or shape.

The 03 bond angle will be 116° degrees since it has a Bent molecular geometry

8 0
3 years ago
107. The lightest noble gases, such as helium and neon, are completely inert—they do not form any chemical compounds whatsoever.
dmitriy555 [2]

Explanation:

Noble gases are group O elements and their atomic structure ensures that they are stable. All their orbitals are completely filled with electrons therefore they do not undergo reactions with other elements.

  • Heavier noble gases are able to form a range of compounds due their sizes.
  • Elements form compounds by exchanging or sharing of their outermost shell electrons called the valence electron.
  • Every atom has specific energy required to remove electrons from them. The energy is known as the ionization energy.
  • In bigger atoms which have large radius, the outermost electrons have low ionization energy which makes them easy to remove.
  • The ionization energy depends on the nuclear charge, the more the charge the higher the ionization energy. Down a group the nuclear charge and ionization decreases.
  • As we go down the inert group, the ionization energy of outer shell electrons become very low. This makes the electrons available to take part in chemical reactions.

Learn more:

Noble gas brainly.com/question/10874792

#learnwithBrainly

5 0
3 years ago
A nuclear reaction in which two atomic nuclei are combined to produce a single large nucleus and energy is released by the react
Naily [24]
I believe what you are looking for is Fusion<span />
5 0
4 years ago
Which best describes the geologic time scale? It explains why events happen throughout Earth’s history. It presents the correct
sertanlavr [38]

Answer:

Which best describes the geologic time scale? It explains why events happen throughout Earth’s history. It presents the correct sequence of events in Earth’s history. It is used to determine the absolute dates in years for different periods.

3 0
3 years ago
What is the empirical formula of a compound that has a pseudoformula of C3.5H8?
KIM [24]

Answer:

The ratio of carbon and hydrogen atoms = 3.5 : 8

= 7 : 16

Then,the empirical formula is C7H16

5 0
3 years ago
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