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balu736 [363]
3 years ago
8

Consider these elements: p, ca, si, s, ga. a. write the electron configuration for each element

Chemistry
1 answer:
dimulka [17.4K]3 years ago
7 0
Method:

1) Find the atomic number in a periodic table: the number of electrons equal the atomic number

2) Use Aufbau rule

Element     atomic number       electron configuration
<span>
P                15                            1s2 2s2 2p6 3s2 3p3

Ca              20                            </span><span><span>1s2 2s2 2p6 3s2 3p6 4s2

</span>Si                14</span><span>                            1s2 2s2 2p6 3s2 3p2

S                 16</span><span><span>                            1s2 2s2 2p6 3s2 3p4

</span>Ga               31.                   </span><span><span>        1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p</span>       </span>
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According to Le Chatelier’s principle, what happens when the concentration of reactants is doubled in a chemical reaction that w
siniylev [52]

According to Le Chatelier’s principle, if the dynamic equilibrium of a system is disturbed by any change in the conditions of the system then the equilibrium will adjust itself in such a way that new equilibrium moves to counteract the change.

Hence, when the concentration of reactants is doubled in a chemical reaction that was in equilibrium then the equilibrium shifts to the right to favor the formation of products.


8 0
3 years ago
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A carbon atom has a strong tendency to do which of the following?. Answer. double bond with electrons. receive electrons. donate
Novay_Z [31]

Answer: Option (d) is the correct answer.

Explanation:

Atomic number of carbon is 6 and its electronic distribution is 2, 4. Therefore, in order to become stable and completely fill its octet carbon readily share its valence electrons with another atom.

For example, C + 2H_{2} \rightarrow CH_{4}

A carbon atom is also able to form a double double with valence  electrons of other atom.

Thus, we can conclude that a carbon atom has a strong tendency to share electrons.

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Hurry i only have till today to finsh this!
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Solid calcium hydroxide is dissolved in water until the pH of the solution is 10.44. Determine the concentration of the calcium
Orlov [11]

Answer:

1.38x10⁻⁴ M

Explanation:

First, we <u>calculate the pOH of the solution</u>, using the <em>given pH</em>:

  • pOH = 14 - pH
  • pOH = 14 - 10.44
  • pOH = 3.56

Now we <u>calculate the concentration of OH⁻</u>, using<em> the pOH</em>:

  • pOH = -log[OH⁻]
  • [OH⁻] = 10^{-pOH} = 2.75x10⁻⁴ M

Following the reaction Ca(OH)₂ → Ca⁺² + 2OH⁻, we divide [OH⁻] by 2 to calculate [Ca(OH)₂]:

  • [Ca(OH)₂] = 2.75x10⁻⁴ M / 2
  • [Ca(OH)₂] = 1.38x10⁻⁴ M
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2 years ago
What similarities and difference exist between electrons and neutrons? Consider charge, size, location and number.
Alborosie

<u>Charge:</u>

An electron has a negative charge and a <em>n</em>eutron has a <em>n</em>eutral charge.


<u>Size:</u>

Electrons have a really small mass whereas the neutron has a mass of about 1 amu.


<u>Location:</u>

Neutrons are found in center of an atom, but electrons are around it.


<u>Number:</u>

The number of electrons and neutrons in atom varies.

7 0
3 years ago
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