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frozen [14]
4 years ago
13

Which statement correctly describes an atom of the element helium

Chemistry
1 answer:
Assoli18 [71]4 years ago
5 0
Is this a multiple choice? Anyways I will just give you a written answer and hopefully it helps.

A: Helium is made up of two electrons held by electromagnetic force to two protons that are inside of a nucleus along with one or two neutrons.
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To survive and advance, humans have used the natural resources in their environment for at least as long as recorded history.
Otrada [13]

Answer:

water, as there is 0.01% of itis left, mainly from polar caps, potable water is present, if it is not used carefully, then there will be no potable water for us to drink

Explanation:

3 0
4 years ago
Z=3 1s2 express answer as an ion
sashaice [31]

Answer:

The element with electronic configuartion  1s² and atomic number 3 must be an cation.

Explanation:

The "Z" shows the atomic number. Z stand for zahl. It Is German word and meaning is " number".

In given question Z is equal to three which means an element with atomic number three.

Let consider the X is an element with atomic number three having electronic configuration 1s², but according to this atomic number there should be one more electron present is 2s. If X has the electronic configuration 1s² it means that it lose one electron and X is present in the form of cation.

X⁺ =  1s²

7 0
3 years ago
How many molecules of iodine are produced when 9.3×1026 molecules of chlorine gas react with lithium iodide?
Bas_tet [7]

Answer:

9.3x10^{26}molec\ I_2

Explanation:

Hello!

In this case, considering the balanced chemical reaction:

Cl₂ + 2LiI ⇒ 2LiCl + I₂

We can see there is a 1:1 mole ratio between the produced iodine and the used chlorine, thus, we infer that the number of molecules of iodine given those of chlorine turn out:

9.3x10^{26}molec\ Cl_2*\frac{6.022x10^{23}molec\ I_2}{6.022x10^{23}molec\ Cl_2} =9.3x10^{26}molec\ I_2

Best regards!

8 0
3 years ago
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Phenazopyridine is used to treat what
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4 years ago
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How do decomposers get energy
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They get energy by Breaking down dead organisms and animal wastes.
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3 years ago
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