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xeze [42]
3 years ago
9

Which statement is true of unstable isotopes?

Chemistry
1 answer:
grin007 [14]3 years ago
7 0

<u>Answer: </u>The correct answer is Option D.

<u>Explanation:</u>

Unstable isotopes are defined as the isotopes which have excess of neutrons as compared to the stable form of the nucleus of an atom.

These isotopes attain stability by undergoing a spontaneous nuclear decay. The isotopes which are unstable have another name and are known as radioactive isotopes or radioisotopes.

These isotopes undergoes decay by 4 processes: Alpha decay, beta decay, gamma emission and positron decay.

Hence, the correct answer is option D.

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5 0
3 years ago
A rectangle has a volume of 395cm3. It has a mass of 147g. What is its density? *
LekaFEV [45]

The density of a rectangle : ρ = 0.372 g/cm³

<h3>Further explanation</h3>

Given

The volume of rectangle : 395 cm³

Mass : 147 g

Required

The density

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume

Input the value :

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ρ = 0.372 g/cm³

6 0
3 years ago
PRACTICE PROBLEMS
Likurg_2 [28]
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Explain how index minerals allow a scientist to understand the history of a metamorphic rock?
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