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ivanzaharov [21]
3 years ago
11

What do elements in the same period have in common

Chemistry
2 answers:
kenny6666 [7]3 years ago
5 0

If by Period you mean Column, they share the same amount of electrons in their outer shell.
ICE Princess25 [194]3 years ago
3 0
They all have the same number of electrons in their outer shell. This determines their valence level. So that's also what they have in common. Hope this helps. 
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What elements are highlighted:<br> a. Nonmetals<br> b. Metals<br> C. Metalloids
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(It’s both halogens and noble gases ) the other ones which are white(not highlighted) are alkali metals, alkaline earth metals, and transition metals :3
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3 years ago
Dew forming on grass is an example of condensation true or fales and explain
exis [7]
True becuase dew is coming out of the air which if you look at a glass of water it has condensation on it becuase it is hot
7 0
4 years ago
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A gas with a volume of 4.0L at a pressure of 205 kPa is allowed to expand to a volume of 12000 mL. What is the pressure in atmos
Leni [432]

Answer: The pressure in atmospheres is 0.674 in the container if the temperature remains constant.

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

P\propto \frac{1}{V}     (At constant temperature and number of moles)

P_1V_1=P_2V_2  

where,

P_1 = initial pressure of gas  = 205 kPa

P_2 = final pressure of gas = ?

V_1 = initial volume of gas  = 4.0 L

V_2 = final volume of gas = 12000 ml = 12 L    (1L=1000ml)  

205\times 4.0=P_2\times 12  

P_2=68.3kPa=0.674atm        (1kPa=0.0098atm)

Therefore, the pressure in atmospheres is 0.674 in the container if the temperature remains constant.

8 0
3 years ago
Can I get help with this, please!!
kondor19780726 [428]

Pressure in the submarine when the temperature is changed to 293 K is 108.9 K Pa

Explanation:

Pressure in the submarine = 108.9 kPa

Volume, V = 2.4 * 10^5 L

Pressure, P = 116k Pa

Temperature, T = 312 K

Ideal gas law: PV = nRT  or  n = PV / RT

So, moles of gas, n =116 KPa * 2.4 * 10 ^5L / 8.314 LK Pa K^-1 *312 K

= 1.073 *10^4 mol

when temperature is changed to 293K,

PV = nRT  or P = nRT / V

=1.073 *10^4 mol *8.314 LK Pa mol^-1 K^-1 *293 K / 2.4*10^5L

=108.9 K Pa

Pressure in the submarine when the temperature is changed to 293 K is 108.9 K Pa

8 0
3 years ago
Wat two common uses for Gallium??
Ann [662]

Answer:

mirrors and metal thermometers

Explanation:

ooga booga

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3 years ago
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