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miv72 [106K]
3 years ago
14

Of the elements below, __________ is the least metallic.

Chemistry
1 answer:
dsp733 years ago
8 0
Answer: last option: Ar

Justification:

The metallic character of the elements in the periodic table increase from right to left and from top to bottom.

That means that the elements of groups (rows) 1 and 2 and periods (columns) 6 and 7 are the most metallics, and the elements of groups 17 and 18 and periods 1 and 2 are the least metallics.

Na, Mg, Al, P and Ar are in the same period (row) so you can differentiate their metallic character by the rule that  the more to the right on the row the less metallic the element is.

Na (left end the row) is the most metallic and Ar (right end of the row)  is the least metallic.

P and Ar are less metallic.

Then, the list arranged in order of decreasing metallic character is:

Na > Mg > Al > P > Ar.

Therefore, the answser is Ar.
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Enzymes use several types of catalytic mechanisms. Differentiate between acid-base catalysis
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Answer:

Explanation:

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6 0
4 years ago
A sample of copper with a mass of 63.5g contains 6.02 x10^23 atoms calculate the mass of an average copper atom
romanna [79]

Answer:

1.024 x 10⁻²²g

Explanation:

Data Given:

mass of copper = 63.5 g

no. of atoms of copper = 6.02 x10²³ atoms

mass of of an average copper = ?

Solution:

As 6.02 x10²³ atoms have 63.5 g of mass then what will be the mass of atom.

Apply unity formula

                     63.5 g of copper ≅ 6.02 x10²³ atoms of copper

                     mass of copper atom ≅ 1 atom of copper

Do cross multiplication

                     mass of copper atom = 1 atom x 63.5 g / 6.02 x10²³ atoms

                     mass of copper atom = 1.024 x 10⁻²² g

mass of an average copper atom = 1.024 x 10⁻²² g

6 0
4 years ago
What is the difference between the energy of spring A, stretched 0.6 meters, and spring B, stretched 0.3 meters, if they have th
oee [108]
Spring a has more potential energy then spring b
5 0
3 years ago
Which factors have the greatest effect on the rate of a chemical reaction between agno3 and cu
Phoenix [80]

Answer:

Surface area of the reactants

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7 0
3 years ago
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What is the pressure in a 3.41 l container that has 0.741 moles of oxygen gas at 26.0 °c? question 13 options:?
Westkost [7]
To answer this question, we will use the general gas law which has the following formula:
PV = nRT where:
P is the pressure of the gas that we need to calculate
V is the volume of gas = 3.41 liter = 0.00341 m^3
n is the number of moles = 0.741 moles
R is the gas constant = <span> 8.314 </span>J/(K·mol<span>)
T is the temperature = 26 degree Celsius = 299 degree kelvin

Substitute with the givens in the above equation to get the pressure as follows:
P*0.00341 = 0.741*8.314*299
P = 540188.1308 Pascal</span>
5 0
4 years ago
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