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drek231 [11]
3 years ago
9

Which of the following elements is very reactive and needs to gain one electron to have a full outermost shell?

Chemistry
2 answers:
natita [175]3 years ago
6 0

Answer:   Iodine

Explanation:  Cesium is the alkali metal which belongs to the group 1 of the periodic table.

Iodine is the Group 17 element which are known as the Halogens as they are the group of the most electronegative atoms.

Zinc belongs to the Transition metal d block .

Xenon belongs to the Group 18 of noble gases.

The electronic configuration will help us to determine which can gain electron to have a full outermost shell.

Cesium (Cs) = [Xe] 6s1

Zinc (Zn) = [Ar] 3d10 4s2

Iodine(I) =  [Kr] 4d10 5s2 5p5

Xenon (Xe) = Kr 4d10 5s2 5p6

Thus Iodine can easily gain one electron to have complete outermost shell.

NISA [10]3 years ago
4 0
Iodine has 7 valence electrons. It needs therefore only 1 electron to be stable this is why it is so reactive.
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A force of 2,500 pounds drags a truck 30 feet in 1/2 minute.
scoray [572]
The right subject for this question is physics.

To calculate the work you use the formula:

Work = force * displacement

Work = 2500 pounds * 30 feet = 75,000 pounds - feet



To calculate the power you use the formula:

power = work / time

Power = 75,000 pound - feet / 30 seconds = 2300 pound-feet / second.
3 0
3 years ago
does the nitro group on the pyridine ring make the ring more electron rich or more electron deficient
Arte-miy333 [17]

Answer:

more electron deficient

Explanation:

The nitro group is an electron withdrawing group. It withdraws electrons from the pyridine ring by resonance.

This electron withdrawal by resonance makes the pyridine ring less electron rich or more electron deficient.

Hence, the nitro group makes the pyrinde ring more electron deficient

3 0
3 years ago
.an open flask contains 0.200 mol of air. atmospheric pressure is 745 mmhg and room temperature is 68˚f. how many moles are pres
aleksklad [387]

<u>0.219 moles </u><u>moles are present in the flask when the </u><u>pressure </u><u>is 1.10 atm and the temperature is 33˚c.</u>

What is ideal gas constant ?

  • The ideal gas constant is calculated to be 8.314J/K⋅ mol when the pressure is in kPa.
  • The ideal gas law is a single equation which relates the pressure, volume, temperature, and number of moles of an ideal gas.
  • The combined gas law relates pressure, volume, and temperature of a gas.

We simple use this formula-

The basic formula is PV = nRT where. P = Pressure in atmospheres (atm) V = Volume in Liters (L) n =  of moles (mol) R = the Ideal Gas Law Constant.

68F = 298.15K

V = nRT/P = 0.2 * 0.08206 * 298.15K / (745/760) = 4.992Liters

n = PV/RT = 1.1atm*4.992L/(0.08206Latm/molK * 306K)

n = 0.219 moles

Therefore, 0.219 moles moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚c.

Learn more about ideal gas constant

brainly.com/question/3961783

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4 0
2 years ago
Which statement is true at STP? (The atomic mass of Zn is 65.39 u.)
earnstyle [38]
Zinc is a metal. At STP, it exists as solid and is stable as it is. It is an important mineral and is used in many applications like in food, metal and drugs. Zinc can be found in the Earth's crust and also it is present in small amounts in some food.
7 0
3 years ago
What diffuses more quickly: tetracarbon decahydride (C4H10) or iodine (12)? By how much?
ValentinkaMS [17]

Answer: Butane will effuse more quickly because it has a smaller molar mass

Explanation:

Molar mass of C4H10 = 58.123 g/mole

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5 0
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