Questions and Answers
What is the symbol for Hydrogen?
What is the atomic number of Helium?
2
What is the symbol for Lithium?
Li
Beryllium has the atomic number 5.
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Boron is represented by the symbol B.
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What is the atomic number of Carbon?
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What is the symbol for Nitrogen?
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Which of the following is the symbol for Oxygen?
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What is the atomic number of Fluorine?
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What is the symbol for Sodium?
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What is the atomic number of Magnesium?
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What is the symbol for Aluminum?
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What is the atomic number of Silicon?
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What is the symbol for Phosphorus?
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What is the atomic number of Sulfur?
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What is the symbol for Chlorine?
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What is the atomic number of Argon?
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What is the symbol for Potassium?
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What is the atomic number of Calcium?
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Study Notes
Key Elements of the Periodic Table (1-20)
-
Hydrogen:
- Symbol: H
- Atomic Number: 1
- Lightest element, commonly used in fuel cells.
-
Helium:
- Symbol: He
- Atomic Number: 2
- Noble gas, inert, used in balloons and cooling.
-
Lithium:
- Symbol: Li
- Atomic Number: 3
- Light metal, used in batteries and mood-stabilizing drugs.
-
Beryllium:
- Symbol: Be
- Atomic Number: 4
- Strong metal, used in aerospace components.
-
Boron:
- Symbol: B
- Atomic Number: 5
- Key in glass and ceramics, also used in detergents.
-
Carbon:
- Symbol: C
- Atomic Number: 6
- Foundation of organic chemistry, occurs in all life.
-
Nitrogen:
- Symbol: N
- Atomic Number: 7
- Non-metal gas, makes up 78% of Earth's atmosphere, crucial for proteins.
-
Oxygen:
- Symbol: O
- Atomic Number: 8
- Essential for respiration in most living organisms.
-
Fluorine:
- Symbol: F
- Atomic Number: 9
- Most reactive and electronegative element, used in toothpaste.
-
Neon:
- Symbol: Ne
- Atomic Number: 10
- Noble gas, famous for colorful neon signs.
-
Sodium:
- Symbol: Na
- Atomic Number: 11
- Highly reactive metal, vital for nerve function and salt formation.
-
Magnesium:
- Symbol: Mg
- Atomic Number: 12
- Important for plants, used in alloys and fireworks.
-
Aluminum:
- Symbol: Al
- Atomic Number: 13
- Lightweight metal, used in cans, foil, and construction.
-
Silicon:
- Symbol: Si
- Atomic Number: 14
- Key element in electronics and solar cells, semiconductor properties.
-
Phosphorus:
- Symbol: P
- Atomic Number: 15
- Essential nutrient for plant growth, key component of DNA.
-
Sulfur:
- Symbol: S
- Atomic Number: 16
- Non-metal element, vital for proteins and vitamins.
-
Chlorine:
- Symbol: Cl
- Atomic Number: 17
- Used as a disinfectant and in the production of plastics.
-
Argon:
- Symbol: Ar
- Atomic Number: 18
- Inert gas, used in lighting and welding.
-
Potassium:
- Symbol: K
- Atomic Number: 19
- Important electrolyte for cell function and heart health.
-
Calcium:
- Symbol: Ca
- Atomic Number: 20
- Key for bones and teeth, plays a role in muscle function.
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Description
Test your knowledge of the first 20 elements of the periodic table with these engaging flashcards. Each card includes the element's name, symbol, and atomic number for easy memorization. Perfect for beginners or anyone looking to refresh their chemistry basics!
