atomic number 57

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The term "atomic number 57" refers specifically to the element Lanthanum on the periodic table of elements. Let’s break this down step by step for easier understanding.

Basic Explanation

• Atomic Number: This is a number that tells us how many protons are in the nucleus of an atom of an element. For Lanthanum, the atomic number is 57.
• Lanthanum: It is a type of metal that is soft and white and can easily change color (tarnishes) when it reacts with air or moisture.

Usage Instructions

When you talk about "atomic number 57," you are specifically referring to the element Lanthanum in scientific contexts, such as chemistry or physics.

Example

• "Lanthanum, with atomic number 57, is used in camera lenses and phosphors for certain types of lighting."

Advanced Usage

In more advanced discussions, you might encounter Lanthanum in contexts like: - Chemistry: "The properties of Lanthanum (atomic number 57) make it valuable in the production of strong magnets." - Materials Science: "Research on materials containing Lanthanum focuses on improving the efficiency of batteries."

Word Variants

• Lanthanide: Lanthanum is part of a group of elements known as lanthanides, which includes elements with atomic numbers 58 to 71.
• Rare Earth Element: Lanthanum is classified as a rare earth element, which are a group of 17 chemically similar elements.

Different Meanings

In this context, "atomic number" is a scientific term, but "number" can have other meanings in everyday English (e.g., a numeral, a quantity, or an identifier).

Synonyms

There are no direct synonyms for "atomic number 57," but you can refer to it simply as: - "Lanthanum"

Related Idioms and Phrasal Verbs

While there are no idioms or phrasal verbs specifically tied to "atomic number 57," here are some general science-related phrases: - "Break it down": This means to explain something in simpler terms (like we did with atomic number 57). - "Figure out": To understand how something works, which can apply in learning scientific concepts.

Summary

To summarize, "atomic number 57" refers to the element Lanthanum, a soft, white metal that is used in various applications, including technology and manufacturing.

Academic

Noun

1. a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth

Synonyms

• lanthanum
• La