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3 years ago

Why is atomic radi measured using the nuclues from 2 of the same atoms

Chemistry

1 answer:

irina1246 [14]3 years ago

3 0

Explanation:

Atomic radii is measured using the distance between nucleus of 2 atoms rather than the distance between the nucleus and outermost shell because:

- There is no clear/sharp boundary of the orbital. This is why it is called an electron cloud.

- Also, the exact location of the electron is not known. What is known is the probability of finding the electron there.

Due to this, it is not possible to measure the atomic radii precisely. That's why the distance between the nucleus of two atoms is used.

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4 years ago

1. A student determines the density of water to be 0.966g/ml at a

lions [1.4K]

Answer:

The percentage error in the measurement is 2.4% 

Explanation:

The measurement made by the student is $0.966 g/cm^3$ .

But the actual value of density is $0.943 g/cm^3$

The formula to calculate percentage error is

percentage error = $\frac{(measured \ value-actual \ value)}{(actual \ value)} \times 100$

Hence percentage error in this case is given by

Percentage error = $\frac{(0.966-0.943)}{0.943} \times 100$

= $\frac{0.023}{0.943} \times 100=2.4%$

A physical quantities value will be determines by various quantities. If errors are made in measuring any of these quantities there will be error in the measurement of the final physical quantity as well.

Here density of a substance is a derived quantity determined by measuring mass and volume of that substance. If errors are made in mass and volume measurements the density value will also be erroneous.

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3 years ago

What are three elements that have similar chemical properties to oxygen

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3 years ago

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