Exam: TOEFL

Definition: A type of atom that has the same number of protons as another atom of the same element but a different number of neutrons, resulting in a different mass.

Example: Carbon-14 is a well-known isotope used in dating ancient artifacts.

Definition: Relating to isotopes, which are variants of a chemical element that have the same number of protons but different numbers of neutrons.

Example: The isotopic composition of the sample was analyzed to determine its age.

Definition: In a way that relates to isotopes, which are different forms of the same element with varying numbers of neutrons.

Example: The samples were analyzed isotopically to determine their composition.

Definition: A specific type of homotopy that is consistently represented as an embedding in mathematics.

Example: In advanced mathematics, isotopy is used to study the properties of shapes and spaces.

Definition: A type of biological sample that is a duplicate of a primary specimen, or a subclass of antibodies distinguished by specific chemical and antigenic features.

Example: The scientist compared the isotype to the original holotype to ensure accuracy in their research.

Definition: A type of enzyme that has a similar function to another enzyme but differs in structure and properties.

Example: Different tissues in the body may produce various isozymes that help in specific biochemical reactions.

Definition: Able to be issued or distributed, often referring to documents, currency, or securities that can be formally provided or released.

Example: The company announced that new shares are issuable to investors next month.

Definition: In a way that can be issued or distributed.

Example: The documents were prepared issuably to ensure they could be easily shared.

Definition: To come out or be released from a source; to be published or circulated.

Example: The new magazine will issue next month.

Definition: A topic or problem that people discuss or worry about, often related to public concern or debate.

Example: The government is working to address several important issues affecting the community.

Definition: To distribute or make something available, often in an official way.

Example: The company will issue new guidelines next week.

Definition: A narrow piece of land that connects two larger areas of land.

Example: The Panama Canal was built across the isthmus to connect the Atlantic and Pacific Oceans.