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WARRIOR [948]
3 years ago
13

1. Which electron configuration could represent a strontium atom in an excited state?

Chemistry
1 answer:
Zanzabum3 years ago
8 0

Answer:2,8,18,7,3

Strontium has 38 electrons, adding up those numbers should make 38

Explanation:

The normal electronic configuration of strontium is 2,8,18,8,2, during excitation 1 electron is lost to the outermost shell from the inner shell carrying 8 electrons.

The proton number of an element corresponds with its electronic configuration, the electron at the outermost shell determines how reactive such element will be.

Most alkali metals are very reactive metals which strontium is one

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Answer:

0.0611M of HNO3

Explanation:

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<em />

The reaction of NaOH with HNO3 is:

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<em>1 mole of NaOH reacts per mole of HNO3.</em>

That means the moles of NaOH used in the titration are equal to moles of HNO3.

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12.75mL = 0.01275L * (0.1198mol / L) = 0.0015274 moles NaOH = Moles HNO3.

In 25.00mL = 0.025L -The volume of the aliquot-:

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7 0
4 years ago
Help with this chemistry worksheet
viktelen [127]

Answer:

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Which reaction below represents a balanced, single replacement chemical reaction?
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