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andreev551 [17]
2 years ago
9

Describe the properties of alkaline earth metals. Based on their electronic arrangement, explain whether they can exist alone in

nature. (8 points)
Chemistry
2 answers:
zheka24 [161]2 years ago
7 0

Answer: all i know about alkaline metals is he alkaline earth metals are shiny, silvery-white, and somewhat reactive metals at standard temperature and pressure.

All the alkaline earth metals readily lose their two outermost electrons to form cations with a 2+ charge.

All of the alkaline earth metals except magnesium and strontium have at least one naturally occurring radioisotope.

Magnesium and calcium are ubiquitous and essential to all known living organisms.

Explanation:

pantera1 [17]2 years ago
4 0
No egdhddh dhfhf dudar he e have eje e she fvdrjdvdr th
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Write the chemical formula for this molecule​
Doss [256]

Answer:

C2H4O

Explanation:

The chemical molecular formula is C2H4O.

Also note*: Acetaldehyde is the chemical name for this structural formula.

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3 years ago
If 3 moles of a compound use 24 J of energy in a reaction, what is the A<br> Hreaction in J/mol?
erma4kov [3.2K]

Answer:

+8 J/mol

Explanation:

The following were obtained from the question:

Mole of the compound = 3 moles

Heat Energy used = 24J

Hreaction =?

The heat of reaction is the energy released or absorb during a chemical reaction. It is can obtained mathematically by the following equation:

Hreaction = Heat energy/mole

With the above equation, we can easily find the Hreaction for the question given as follow:

Hreaction = Heat energy/mole

Hreaction = 24J / 3mol

Hreaction = 8 J/mol

Since the compound used the energy, the Hreaction is +8 J/mol

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3 years ago
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In a reaction, chlorine accepts an electron to form Cl-. What is true about the atomic size of the chlorine ion?
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Chlorine atom has 17 electrons and chlorine anion has 18 electrons.

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