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Studentka2010 [4]
3 years ago
10

What happens to the composition of an atom to cause it to become positively or negatively charged?

Chemistry
1 answer:
uranmaximum [27]3 years ago
4 0
It gains or loses electrons to become like the Noble gases having 8 valence electrons to become the most stable.
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Which of the following elements could replace copper in a single replacement reaction?
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I’m thinking it’s gold because lead isn’t with cooper meaning that if u switch lead with cooper it won’t work at all .
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What is the symbol of the ion with 36 electrons and a +2 charge?
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Answer:

Strontium

Explanation:

The atomic number of strontium is 38.

It has 38 electrons.

It is alkaline earth metal. It has two valance electrons.

Strontium loses its two electrons and form cation with +2 charge.

Electronic configuration;

Sr₃₈ = [Kr] 5s²

The valance electrons present in 5s are lost by strontium atom and form Sr⁺² cation.

it is yellowish-white metal.

It is highly reactive.

It form salt with halogens.e.g

Sr    +   Br₂    →     SrBr₂

IT react with oxygen and form oxide.

2Sr   +   O₂   →    2SrO

this oxide form hydroxide when react with water,

SrO  + H₂O   →  Sr(OH)₂

With nitrogen it produced nitride,

3Sr + N₂     →  Sr₃N₂

With acid like HCl,

Sr + 2HCl  →  SrCl₂ + H₂

3 0
3 years ago
if you were to engineer an everyday solution for conserving water which activity do you think would be the most impactful ?
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If you were to engineer an everyday solution for conserving water which activity do you think would be the most impactful ?
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The figure above shows the Earth at two different positions in its orbit around the Sun. Which position corresponds to summer in
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A. Position B.

Explanation:

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A red car and a blue car collide. What would be an example of Locard's exchange principle in this situation?
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