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noname [10]
3 years ago
8

Why is electrical conductivity a resourceful property of metals like copper, silver, and aluminum?

Chemistry
1 answer:
aleksley [76]3 years ago
3 0

Answer:

The electrical conductivity of metals come from the fact that their outer electrons have been delocalised (meaning that the elections are not locked into atoms but can move freely throughout the metal ) .

And , the electrical conductivity of a metal is determined by the ease of movement of the electrons past the atoms<em> </em><em>under the influence of an electric field</em>.

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An atom of 105In has a mass of 104.914558 amu. Calculate the binding energy in MeV per NUCLEON. Enter your answer with 3 signifi
joja [24]

Answer:

8.46

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

Also, atomic number of I = 549

Thus, the number of protons = 49

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

105 =  49 + Number of neutrons

Number of neutrons = 56

Mass of neutron = 1.008665 amu

Mass of proton = 1.007825 amu

Calculated mass = Number of protons*Mass of proton + Number of neutrons*Mass of neutron

Thus,

Calculated mass = (49*1.007825 + 56*1.008665) amu = 105.868665 amu

Mass defect = Δm = |105.868665 - 104.914558| amu = 0.954107 amu

The conversion of amu to MeV is shown below as:-

1 amu = 931.5 MeV

<u>So, Energy = 0.954107*931.5 MeV/atom = 888.750671 MeV/atom</u>

Also, 1 atom has 105 nucleons (Protons+neutrons)

<u>So, Energy = 888.750671 MeV/105nucleons = 8.46 MeV/nucleon</u>

<u>Answer:- 8.46</u>

8 0
3 years ago
PLEASE Help I will give u brainliest for if u get right.
solong [7]

Answer:

H

Explanation:

Hydrogen is a nonmetal love:)

3 0
3 years ago
Read 2 more answers
To break a chemical bond, energy must be(1) absorbed (2) destroyed (3) produced (4) released
Troyanec [42]

Answer: 1) absorbed

Explanation:

As a chemical bond is formed either by transfer of electrons or sharing of electrons, in order to break the forces of attraction among atoms, energy must be absorbed.

Energy is produced or released when  a chemical bond is formed.

Energy is never destroyed, it converts from one form to another.

3 0
4 years ago
Read 2 more answers
Which is a strong base? HCl NaOH NH3 H3CO3
STatiana [176]

Answer:

The answer is B: NaOH :3

Explanation:

Hope this helped :D

6 0
3 years ago
Garfield (weighing 24 lbs) took a flight to the moon on the space shuttle. As usual, he stuffed himself with lasagna during the
Nata [24]

Answer:

Yes, it is due to the gravitational pull from the moon

Explanation:

The mass of Garfield didn't change during the flight, which is to say, the amount of matter in his body is the same on Earth as on the Moon.

However, <em>weight is a measurement of how strongly mass is pulled towards the ground, due to the gravitational pull.</em>

So even though Garfield's mass is the same, the weight is less due to the lower gravitational pull from the Moon compared to Earth (the weight is one-sixth of the original weight as gravity on the moon is about one-sixth of Earth's). When Garfield returns to Earth, the scale will still read 24 lbs.

4 0
3 years ago
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