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brilliants [131]
3 years ago
5

Difference between word equation and formula equation in table​

Chemistry
1 answer:
irakobra [83]3 years ago
3 0

ANSWER:

in words equations we use words to show what happens using words a chemical reaction.

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The elements from this section of the periodic table all belong to the same
krok68 [10]

Answer:

Option C = same period.

Explanation:

All these elements belongs to second period of periodic table. This period consist of eight elements lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon.

Electronic configuration of lithium:

Li₃ = [He] 2s¹

Electronic configuration of beryllium:

Be₄ = [He] 2s²

Electronic configuration of boron:

B₅ = [He] 2s² 2p¹

Electronic configuration of carbon:

C₆ = [He] 2s² 2p²

Electronic configuration of nitrogen:

N₇ = [He] 2s² 2p³

Electronic configuration of oxygen:

O₈ = [He] 2s² 2p⁴

Electronic configuration of fluorine:

F₉ = [He] 2s² 2p⁵

Electronic configuration of neon:

Ne₁₀ = [He] 2s² 2p⁶

All these elements present in same period having same electronic shell.

However their families, valance electrons and group are different. Boron have three valance electrons and belongs to group 3A. Carbon belongs to group 4A and have 4 valance electrons. Nitrogen belongs to group 5A and have five valance electrons. Oxygen belongs to group 6A and have six valance electrons. Fluorine belongs to group 7A and have seven valance electrons.

7 0
3 years ago
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A solution of HCl has a concentration of 1.20 x 10-2 M. What is the pH of this solution?
Westkost [7]
-log (1.2x10^-2) = 1.92 so C
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3 years ago
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I have lungs but no legs. My offspring are found in membranous-shelled eggs and use lungs to breathe.
elena-14-01-66 [18.8K]
Its a snake. snakes have lungs and a foot but no legs. its offspring are in eggs
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Please answer for me ☺️
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They diffuse through small pores at the bottom of the leaf called stomata.

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3 years ago
Which substance is a compund
Oxana [17]
Answers:
______________________________________________
  1)   [D]:  " CO₂ " .  

<u>Note:</u><u> </u> This is the only answer choice given that is composed of:  "at least two different elements" .
_______________________________________________
  2)  [D]:  "carbon and hydrogen" {"C" and "H" .} .
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7 0
3 years ago
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