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Katyanochek1 [597]
3 years ago
12

Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is

followed by scandium (atomic number 21). Which element should have the largest atomic radius?
Chemistry
1 answer:
Anika [276]3 years ago
3 0
Atomic radius increases as you move left across the periodic table, therefore, potassium will have the largest atomic radius
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4 years ago
A 34.0 g piece of metal is heated to 92.0°C then placed in a beaker of water containing 22.0 g of water at 19.0°C. The temperatu
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Answer:

0.1988 J/g°C

Explanation:

-Qmetal = Qwater

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Where;

Q = amount of heat

m = mass of substance

c = specific heat of substance

∆T = change in temperature

Hence;

-{mc∆T} of metal = {mc∆T} of water

From the information provided in this question, For water; m= 22.0g, ∆T = (24°C-19°C), c = 4.18J/g°C.

For metal; m= 34.0g, ∆T = (24°C-92°C), c = ?

Note that, the final temperature of water and the metal = 24°C

-{34 × c × (24°C-92°C)} = 22 × 4.18 × (24°C-19°C)

-{34 × c × (-68°C)} = 459.8

-{34 × c × -68} = 459.8

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c = 0.1988

The specific heat capacity of the metal is 0.1988 J/g°C

6 0
3 years ago
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