If an atom has an atomic number of 8, how many protons does it have and what is the element

Chemistry

1 answer:

Sergio039 [100]3 years ago

7 0

Answer:

Oxygen with the symbol O has the atomic number 8 which means it is the 8th element in the table. The number eight also means that oxygen has eight protons in the nucleus.

Explanation:

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4. Determine what elements are in the following compounds.

lilavasa [31]

Nitrogen=2, Hydrogen=8, Carbon=1, Oxygen=3

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4 years ago

What two elements fill their last electron in the 5s sublevel?

postnew [5]

Answer:Rubidium and Strontium

Explanation:

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3 years ago

Steve walks from his house 5 I'm south then turns east and walks 2 km. Then he walks 9 in North to his older sister's house. She

IgorLugansk [536]

Answer:

18 km

Explanation:

To know the distance, you need to be clear in the concept of distance.

According to the physics, the distance is a measurement that refers to the fact of how much an object has move from one point to another.

In this case, we have a person named Steve and he's walking through several points.

To calculate the distance that he moved, you just need to sum all the values of distance. In this case, it's not neccesary to do calculations regarding the components of the x or y axis, because we are not talking about displacement, where it actually counts. But in this case, we just need all the covered distance that Steven walked since the beggining.

So, no more talk, let's do calculations:

D = 5 + 2 + 9 + 2 = 18 km

So the final answer would be:

<h2>Distance = 18 km</h2>

Hope this helps

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3 years ago

Baking soda (nahco3) is an active ingredient in some antacids. determine the percent composition of oxygen in baking soda.

telo118 [61]

Assuming the question is asking for percent composition by mass,

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Likurg_2 [28]

The question is incomplete. Complete question is attached below:
...........................................................................................................................

Answer:
Given: conc. of HBr = 1.4 M
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We know that, M1V1 = M2V2
(HBr) (KOH)

Therefore, M2 = M1V1/V2
= 1.4 X 15.4/22.10
= 0.9756 M

Concentration of KOH is 0.9756 M.

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3 years ago

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