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kenny6666 [7]
3 years ago
15

Which statement describes the general trends in electronegativity and first ionization energy as the elements in Period 3 are co

nsidered in order from Na to Cl?
(1) Electronegativity increases, and first ionization energy decreases.

(2) Electronegativity decreases, and first ionization energy decreases.

(3) Electronegativity and first ionization energy both increase.

(4) Electronegativity and first ionization energy both decrease.
Chemistry
2 answers:
Andru [333]3 years ago
8 0
(3) Electronegativity and first ionization energy both increase describes the general trends in electronegativity and first ionization energy as the elements in Period 3 are considered in order from Na <span> to Cl.</span>
Alex17521 [72]3 years ago
4 0
Correct Answer: <span>(3) Electronegativity and first ionization energy both increase.

Reason:
Electronegativity and ionization energy are dependent on effective nuclear charge and size of atom.

As we move along the periodic table from left to right, atomic size decreases and effective nuclear charge increases. The increase in effective nuclear charge and decrease in atomic radii favor ionization energy and electronegativity. 

Hence, in 3rd period (from Na to Cl) electonegativity and 1st ionization energy increases. </span>
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In which step of a four-stroke engine cycle does the car release CO2, H2O, and CO?
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Answer:

\boxed{\text{exhaust stroke}}

Explanation:

The four strokes are

  1. Intake: The mixture of air and fuel enters the cylinder.
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  3. Ignition: A spark ignites the fuel, which burns and produces CO₂, CO, and H₂O.
  4. Exhaust: The combustion products are expelled from the cylinder.

\text{The cylinder releases CO$_{2}$, CO, and H$_{2}$O during the }\boxed{\textbf{exhaust stroke}}

7 0
3 years ago
The idea that the earth is divided into a number of small plates that float on the mantle and slide,collide,and slip past each o
IgorLugansk [536]

Answer:

Theories

Explanation:

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7 0
2 years ago
How are atoms an example of diversity?
Ivan

D. Atoms form millions of molecules. :)

8 0
2 years ago
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Consider the nuclear equation below. Superscript 22 subscript 11 upper N a right arrow superscript 22 subscript 10 upper N e plu
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Answer:

+1

Explanation:

For the equation to be balanced, the total mass number and the total atomic number on both side of the equation but be equal.

This is illustrated:

For the mass number:

Left side: 22

Right side: 22 + 0 = 22

For the atomic number:

Left side: 11

Right side: 10 + x

11 = 10 + x

Collect like terms

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See attachment for further explanation.

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3 years ago
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A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. The concentration o
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Answer:

The concentration the student should write down in her lab is 2.2 mol/L

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S: 32.065 u

O: 15.999 u

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Mass of Na2S2O3 taken = (19.440 - 2.2) g = 17.240 g.

For mole(s) of Na2S2O3 = (mass taken)/(molar mass)

= (17.240 g)/(158.105 g/mol) = 0.1090 mole.

Volume of the solution = 50.29 mL = (50.29 mL)*(1 L)/(1000 mL)

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To find the molar concentration of the sodium thiosulfate solution prepared we use the formula:

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= 2.1674 mol/L

6 0
3 years ago
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