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V125BC [204]
3 years ago
8

An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryll

ium. Which element is element X?
sodium (Na)
boron (B)
magnesium (Mg)
lithium (Li)
Chemistry
2 answers:
zavuch27 [327]3 years ago
5 0

Correct answer choice is :


A) sodium (Na)


Explanation:


It's a light element, reactive and with a low melting point, with a corresponding density of 0,97 at 20ºC. From the business point of view, sodium is the most significant of all the alkali elements. Sodium acts immediately with water, and also with snow and ice, to create sodium hydroxide and hydrogen.


Eddi Din [679]3 years ago
3 0
Sodium has three shells of electrons instead of two and has one electron in its valence shell. Beryllium has two in its valence shell.

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Read the information about the halogen family.
Elodia [21]

Answer:

See explanation

Explanation:

Chlorine is a member of the halogen family known as a toxic yellowish green gas. Inhalation of chlorine for a prolonged period of time leads to  pulmonary edema. If a person comes in contact with compressed liquid chlorine the person may experience frostbite of the skin and eyes.

However chlorine is very useful in water disinfection and is preferred in water treatment because it provides residual disinfection of the treated water.

Chlorine gas may be dissolved in NaOH to form oxochlorate I which is used as a bleach in cleaning.

7 0
3 years ago
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Kipish [7]

Answer:

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Explanation:

8 0
3 years ago
If you have 6 moles of CH4 how many moles of H2O can be produced
nadya68 [22]

Answer:

Explanation:

CH4 + 2O2 --> CO2 + 2H2O

1mol generates 2 moles of H2O

Therefore 6 Moles produce 12 moles of H2O

8 0
3 years ago
How many electrons occupy p orbitals in a bismuth atom?
Ahat [919]
Atomic number Bi = 83 
electron configuration Bi : 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3 

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4 0
4 years ago
In 1901, Thomas Edison invented the nickel-iron battery. The following reaction takes place in the battery. Fe(s) + 2 NiO(OH)(s)
lord [1]

Ans: Moles of Fe(OH)2 produced is 5.35 moles.


Given reaction:

Fe(s) + 2NiO(OH) (s) + 2H2O(l) → Fe(OH)2(s) + 2Ni(OH)2(aq)

Based on the reaction stoichiometry:

1 mole of Fe reacts with 2 moles of NiO(OH) to produce 1 mole of Fe(OH)2

It is given that there are:

5.35 moles of Fe

7.65 moles of NiO(OH)

Here the limiting reagent is Fe

Therefore, number of moles of Fe(OH)2 produced is 5.35 moles.



4 0
4 years ago
Read 2 more answers
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