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Atomic Mass Number and Actual Atomic Mass Quiz

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Atomic Mass Number and Actual Atomic Mass Quiz

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Questions and Answers

What is the most important factor affecting nuclear stability?

Number of electrons

Number of protons

N/P ratio (correct)

Number of neutrons

Why do neutrons contribute to the stability of a nucleus?

Due to their positive charge

Because they contribute to coulombic forces

Because they are lighter than protons

They help prevent proton-proton repulsions (correct)

What happens when a nucleus contains too few neutrons and protons?

It becomes stable

Its atomic mass decreases

It undergoes radioactive decay (correct)

It emits gamma radiation

In stable nuclei, what trend is observed when plotting Neutron against Proton?

A band curving towards neutrons in high atomic mass elements Signup and view all the answers

What do neutron-rich atoms typically have in common?

Z greater than 80 Signup and view all the answers

What happens when a nucleus emits an alpha particle?

It loses 2 units of positive charge Signup and view all the answers

What is the outcome if a nucleus is extremely unstable?

It emits gamma radiation Signup and view all the answers

What do stable atoms follow on a plot of Neutron against Proton?

$N/Z = 1$ line at 45 degrees Signup and view all the answers

What is the significance of the N/P ratio in a nucleus?

$N/P$ ratio affects the stability of a nucleus Signup and view all the answers

Why are more neutrons required as the number of protons in the nucleus increases?

$Z$ leads to heavier elements requiring more neutrons for stability Signup and view all the answers