atomic number 91

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The term "atomic number 91" refers to a specific element in the periodic table called protactinium. Here’s a simple breakdown to help you understand it better:

Basic Explanation:

• Atomic Number: This is a number that tells us how many protons are in the nucleus (the center part) of an atom of an element. For protactinium, this number is 91.
• Element: An element is a basic substance that cannot be broken down into simpler substances. Each element has unique properties.
• Radioactive: This means that the element can emit energy in the form of radiation. It is unstable and can change into other elements over time.
• Metallic: Protactinium is a metal, which means it has properties like being shiny and good at conducting electricity.

Usage Instructions:

• You can use "atomic number 91" when discussing chemistry, physics, or elements in a scientific context. It's not typically used in everyday conversation unless you are talking about science.

Example Sentence:

• "Protactinium, with atomic number 91, is a radioactive element that scientists study to understand nuclear reactions."

Advanced Usage:

• In advanced discussions, you might encounter phrases like "nuclear fission" or "radioactive decay," which involve atomic number 91 and its properties.

Variants:

• The only common form related to atomic number 91 is its name, protactinium. There aren't many variants since it is a specific element.

Different Meaning:

• The phrase "atomic number" is used in science to refer to the number of protons in any element. It does not have different meanings outside of this context.

Synonyms:

• There are no direct synonyms for "atomic number 91," but you might hear related terms like "element 91" or simply "protactinium."

Idioms and Phrasal Verbs:

• There are no idioms or phrasal verbs specifically related to "atomic number 91." However, in scientific discussions, you may hear phrases like "break down" when talking about radioactive decay.

Summary:

"Atomic number 91" refers to protactinium, a radioactive metallic element.

Academic

Noun

1. a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

Synonyms

• protactinium
• protoactinium
• Pa