atomic number 11

Friendly

The phrase "atomic number 11" refers specifically to the chemical element sodium, which is represented by the symbol "Na" on the periodic table. Let’s break this down for better understanding.

Explanation

• Atomic Number: This is a number that defines an element. Each element has a unique atomic number based on the number of protons in its nucleus. For sodium, the atomic number is 11, meaning it has 11 protons.
• Sodium: Sodium is a soft, silvery-white metal that is very reactive, especially with water.

Usage Instructions

• When to use: You can use "atomic number 11" when discussing elements in chemistry, particularly when talking about the periodic table or the properties of sodium.

Example

• Basic Sentence: "Sodium, with atomic number 11, is an essential element for human life."

Advanced Usage

• In chemistry, you might encounter phrases like "the reactivity of atomic number 11" when discussing sodium's behavior in reactions.

Word Variants

• Noun: Sodium
• Adjective: Sodium-related (e.g., sodium chloride, which is table salt)

Different Meanings

• Sodium can refer to the element itself, but it can also refer to compounds that contain sodium, such as sodium bicarbonate (baking soda) or sodium chloride (table salt).

Synonyms

• There are no direct synonyms for "atomic number 11," but "sodium" is the common name for the element.

Idioms and Phrasal Verbs

• There aren't specific idioms or phrasal verbs associated with "atomic number 11," but in a broader sense, you might hear phrases like "to go out with a bang," which can metaphorically relate to sodium's reactivity.

Summary

So, "atomic number 11" is a scientific term used to describe sodium, a very important and reactive element.

Academic

Noun

1. a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)

Synonyms

• sodium
• Na