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Citrus2011 [14]
3 years ago
11

Describe the organism that scientists believe was responsible for changing the composition of the early atmosphere. What is it c

alled and how did it change the atmosphere? Why was this change to the atmosphere so important?
Chemistry
2 answers:
Yakvenalex [24]3 years ago
6 0

The early atmosphere was most likely principally CO2, with very little or no chemical element. The proportion of chemical element went up attributable to chemical change. The chemical change was conducted from little organisms.

lara31 [8.8K]3 years ago
4 0
The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. <span>The proportion of oxygen went up because of </span>photosynthesis. The photosynthesis was conducted from <span>tiny organisms.
</span><span>cyanobacteria, or blue-green algae. </span><span>
They </span>used sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. This change to the atmosphere was very important because the <span>breathable air we enjoy today was created.</span>
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Reptile [31]

Answer is 56 protons and 56 electrons.

<em>Explanation;</em>

Atomic number is equal to number of protons. Hence, when the atomic number is 56, it means that atom has 56 protons.

When the element is in neutral state, number of protons = number of electrons. Hence, we can say that barium atom has 56 electrons.

But same element can have different number of neutrons. Those are called isotopes. Hence, we cannot say that there are 56 neutrons in barium atom without having its mass number. (Mass number = number of protons + number of neutrons)

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djyliett [7]

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Andrews [41]

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The correct answer is (D)


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The explanation:


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