atomic number 15

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The term "atomic number 15" refers specifically to the element phosphorus in the periodic table. Let’s break this down for a new English learner:

Basic Explanation:

• Atomic Number: This is a number that tells us how many protons are in the nucleus (center) of an atom of an element. Each element has a different atomic number.
• 15: This means that phosphorus has 15 protons in its atoms.

Definition:

Phosphorus is a nonmetal element found in nature. It is important for life and is commonly found in rocks and in all living cells. It is also known for being very reactive, meaning it can easily combine with other elements to form new substances.

Usage Instructions:

• When you see the term "atomic number 15," it is specifically referring to phosphorus. You might encounter this in science classes, especially in chemistry.

Example:

• "Phosphorus, with atomic number 15, is essential for plant growth and is found in fertilizers."

Advanced Usage:

• In scientific discussions, you might refer to phosphorus in terms of its various allotropes (different forms of the same element), such as white phosphorus and red phosphorus. Each form has different properties and uses.

Word Variants:

• Phosphorescence: A process where materials emit light after being energized.
• Phosphate: A chemical compound containing phosphorus, often used in fertilizers.

Different Meaning:

• While "atomic number 15" specifically refers to phosphorus in chemistry, the word "phosphorus" can also refer to its role in biology, such as in DNA and ATP (adenosine triphosphate), which are crucial for life.

Synonyms:

• There are no direct synonyms for "atomic number 15" as it is a specific scientific term, but "phosphorus" is the common name for the element.

Idioms and Phrasal Verbs:

• There are no specific idioms or phrasal verbs related to "atomic number 15," as it is mainly a scientific term. However, in a broader context, you might hear phrases like "putting the pieces together," which can metaphorically relate to understanding complex scientific information.

Summary:

So, when you hear "atomic number 15," think of phosphorus, an important element in both nature and science.

Academic

Noun

1. a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms

Synonyms

• phosphorus
• P