Midterm Review 2024 Fall

Front

What happens to the mass of an isotope when it undergoes beta decay?

Back

The mass stays the same.

Front

Which isotope of Element Z is more abundant if it has an average atomic mass of 145.9 and two isotopes (Z-145 and Z-146)?

Back

Z-146 is more abundant.

Front

If an atom is neutral, what can be said about its protons and electrons?

Back

It has the same amount of protons and electrons.

Front

What type of bond is formed by only nonmetals?

Back

Covalent bond.

Front

What was the atomic number of the parent isotope before alpha decay if the daughter isotope has an atomic number of 94?

Back

The atomic number of the parent isotope was 96.

Front

Define beta decay.

Back

Beta decay is a type of radioactive decay in which a beta particle (an electron or a positron) is emitted from an atomic nucleus.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the difference between atomic number and mass number?

Back

The atomic number is the number of protons in the nucleus, while the mass number is the total number of protons and neutrons.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Front

What is the significance of the average atomic mass of an element?

Back

The average atomic mass reflects the weighted average of the masses of all the isotopes of an element based on their natural abundance.