Isotopes - Practice

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, resulting in different mass numbers.

Front

What does the 'A' in the isotope symbol represent?

Back

The 'A' represents the mass number, which is the total number of protons and neutrons in the nucleus of an atom.

Front

How do you determine the number of neutrons in an isotope?

Back

Subtract the atomic number (number of protons) from the mass number (A).

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the mass number of Lithium-7?

Back

The mass number of Lithium-7 is 7, which means it has 3 protons and 4 neutrons.

Front

Which isotope has 9 protons and 9 neutrons?

Back

Fluorine-18 has 9 protons and 9 neutrons.

Front

What is the significance of isotopes in chemistry?

Back

Isotopes are important in various applications, including radiometric dating, medical imaging, and nuclear energy.

Front

How many neutrons does Copper-63 have?

Back

Copper-63 has 34 neutrons (63 - 29 = 34, where 29 is the atomic number of Copper).

Front

What is the difference between stable and unstable isotopes?

Back

Stable isotopes do not undergo radioactive decay, while unstable isotopes (radioisotopes) decay over time, emitting radiation.

Front

What is a common use of Carbon-14?

Back

Carbon-14 is commonly used in radiocarbon dating to determine the age of ancient organic materials.