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PSYCHO15rus [73]
3 years ago
10

What happens to the number of valence electrons as you move from element 1 to element 18 on the periodic table?

Chemistry
2 answers:
BARSIC [14]3 years ago
6 0

Answer:

B

Explanation:

the group number is=valence electrons. element 1 is in group 1 element 18 is in group 8. 1<8

zysi [14]3 years ago
3 0

Answer:

the answer is b

Explanation:

i just know

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The reaction which shows oxidation and reduction simultaneously is C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l).

<h3>What are redox reactions?</h3>

Those reaction in which oxidation as well as reduction of substances takes place simultaneously will known as redox reactions.

  • SO₂(g) + H₂O(l) → H₂SO₃(aq)
  • CaCO₃(aq) → CaO(s) + CO₂(g)
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Above reaction are not the redox reactions as in these reaction oxidation and reduction simultaneously not takes place.

  • C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l)

In the above reaction reduction of oxygen takes place as its oxidation state changes from 0 to -2, and at the same time oxidation of carbon takes place as its oxidation state changes from 0 to +4.

Hence correct option is (4).

To know more about redox reactions, visit the below link:
brainly.com/question/7935462

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How are carbon-based molecules suited for sustaining life?
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Life on Earth is based on carbon, likely because each carbon atom can form bonds with up to four other atoms simultaneously. This quality makes carbon well-suited to form the long chains of molecules that serve as the basis for life as we know it, such as proteins and DNA.

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8 0
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Which best describes a neutralization reaction?
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A base is a substance that accepts protons. true or false?
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ziro4ka [17]

Answer:

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When they lose the two valance electrons they form cation X²⁺.

They react with halogens and form salt such as

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The oxidation state of halogens are -1, while the elements of group two A shows +2 that's why two atoms of halogen are combine with one atom of alkaline earth metals and make the compound overall neutral.

All the alkaline earth metals have similar properties.

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