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yawa3891 [41]
3 years ago
12

In the periodic table, how are elements in the same group related to each other? A. They have the same atomic mass. B. They have

very different properties. C. They have the same atomic number. D. They have very similar properties.
Chemistry
2 answers:
SashulF [63]3 years ago
5 0

Answer:

D. They have very similar properties.

Explanation:

A. They have the same atomic mass.

 ⇒ This is false, every element has a different atomic mass.

B. They have very different properties

 ⇒ This is false. elements in the same group have similar properties

C. They have the same atomic number.

⇒ Every element has a unique and different atomic number

D. They have very similar properties.

 ⇒ This is correct. Elements in the same group usually have similar properties, because they have the same number of electrons in the outermost electron shell.

Irina-Kira [14]3 years ago
3 0
Elements in the same group tend to have very similar properties (D). This is due to the number of valence electrons each group has.
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Read 2 more answers
If there are 80 liters of argon gas in a piston and the piston expands the gas until its volume is 2000 liters with a pressure o
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Answer: The correct answer is A. 11.5 atm. The temperature is held constant at 293 K, therefore, we can use Boyle's Law to determine the initial pressure. Boyle's Law states that there is an inverse relationship between pressure and volume of gases. Therefore, as volume increases, the pressure will decrease and vice versa.

Further Explanation:

Boyle's Law can be mathematically expressed as:

P_{initial}V_{initial}\ = P_{final}V_{final}

In this problem, we are given the values:

P(initial) = ?

V(initial) = 80 L

P (final) = 0.46 atm

V (final) = 2000 L

Plugging in these values into the equation:

P_{initial}(80 \ L) = \ (0.46 \ atm)(2000 \ L)\\P_{initial} \ = \frac{(0.46 \ atm) \ (2000 \ L)}{80 \ L}\\P_{initial}\ = 11.5 atm\\

The initial pressure was 11.5 atm. Since the volume increased or expanded, the space where the gas particles move is bigger, so the frequency of collisions with the wall of the container and with other particles are effectively decreased. This, therefore, decreases the pressure from 11.5 to 0.46 atm.

Learn More

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Keywords: gas, Boyle's Law, Ideal Gas Law

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