atomic number 89

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The term "atomic number 89" refers to the element Actinium. Let's break it down for clarity:

Explanation:

• Atomic Number: This is a term used in chemistry to define the number of protons in the nucleus of an atom. Each element has a unique atomic number. For example, hydrogen has an atomic number of 1, meaning it has one proton.
• 89: This indicates that Actinium has 89 protons in its nucleus.
• Radioactive Element: This means that Actinium can emit radiation as it breaks down into other elements over time. This is a natural process that happens with certain elements.
• Actinide Series: Actinium is part of a group of elements in the periodic table known as the actinides, which are typically heavy and radioactive.

Usage Instructions:

• You can use the term "atomic number 89" when discussing elements in chemistry, especially in the context of the periodic table or radioactivity.

Example:

• "Actinium, with atomic number 89, is used in some types of radiation therapy for cancer treatment."

Advanced Usage:

• In scientific discussions, you might refer to Actinium in terms of its isotopes or its applications in nuclear science. For example, "The isotope Actinium-227, derived from atomic number 89, has a half-life of 21.77 years and is used in targeted alpha therapy."

Word Variants:

• Actinium: The name of the element itself.
• Actinide: Refers to the series of elements in which Actinium belongs.

Different Meaning:

• "Atomic number 89" specifically refers to Actinium in chemistry. It does not have other meanings outside of this scientific context.

Synonyms:

• There are no direct synonyms for "atomic number 89," but you can refer to it as "Actinium" when discussing the element itself.

Idioms and Phrasal Verbs:

• There are no idioms or phrasal verbs specifically related to "atomic number 89," as it is a scientific term.

Summary:

"Atomic number 89" is a scientific term that identifies the element Actinium, which is a radioactive element found in uranium ores and is part of the actinide series.

Academic

Noun

1. a radioactive element of the actinide series; found in uranium ores

Synonyms

• actinium
• Ac