- 1. Chemical elements are nature's building blocks, comprising the fundamental substances that make up all matter in the universe. From the lightest element, hydrogen, to the heaviest, oganesson, these elements combine in various ways to form molecules and create everything around us. Each element has unique properties and characteristics that dictate its behavior, such as its atomic number, mass, and reactivity. The periodic table organizes these elements based on their properties, allowing scientists to predict and understand their behavior. Whether it's the noble gases that resist chemical reactions or the alkali metals that readily form ions, each element plays a crucial role in the composition of our world, highlighting the incredible diversity and complexity of nature's chemistry.
Which element has the symbol 'O'?
A) Nitrogen
B) Gold
C) Carbon
D) Oxygen
- 2. The atomic number of hydrogen is:
A) 3
B) 1
C) 4
D) 2
- 3. Which element is a noble gas?
A) Calcium
B) Helium
C) Sulfur
D) Chlorine
- 4. What is the chemical symbol for silver?
A) Al
B) Ag
C) Si
D) Au
- 5. Which element is used in fluorescent lighting?
A) Lead
B) Iron
C) Copper
D) Mercury
- 6. The atomic symbol 'Fe' represents which element?
A) Fluorine
B) Iron
C) Francium
D) Iodine
- 7. What element is essential for human bones and teeth?
A) Zinc
B) Sodium
C) Calcium
D) Potassium
- 8. Which element is commonly found in table salt?
A) Sodium
B) Magnesium
C) Potassium
D) Chlorine
- 9. What is the most abundant element in the universe?
A) Hydrogen
B) Helium
C) Carbon
D) Oxygen
- 10. Which element has the atomic number 6?
A) Sulfur
B) Carbon
C) Oxygen
D) Nitrogen
- 11. The element used to make computer chips is:
A) Silicon
B) Aluminum
C) Copper
D) Zinc
- 12. What is the chemical symbol for gold?
A) Ag
B) Au
C) Fe
D) Pb
- 13. What element gives the red color in rubies?
A) Chromium
B) Titanium
C) Cobalt
D) Neon
- 14. What is the chemical symbol for lead?
A) Fe
B) Pb
C) Au
D) Ag
- 15. The atomic number of carbon is:
A) 8
B) 6
C) 9
D) 7
- 16. Which element is the main component of air?
A) Carbon
B) Oxygen
C) Argon
D) Nitrogen
- 17. The element used in batteries is:
A) Lead
B) Lithium
C) Iron
D) Sulfur
- 18. What is the chemical symbol for iron?
A) Fe
B) Ag
C) Au
D) Pb
- 19. The atomic number of oxygen is:
A) 8
B) 9
C) 6
D) 7
- 20. What is the symbol for the chemical element sodium?
A) Ne
B) Nb
C) Na
D) So
- 21. What is the atomic number of gold?
A) 33
B) 42
C) 79
D) 60
- 22. What is the heaviest naturally occurring element?
A) Thorium
B) Uranium
C) Plutonium
D) Lead
- 23. Which element is a vital component of DNA?
A) Selenium
B) Phosphorus
C) Manganese
D) Boron
- 24. What is the symbol for the chemical element copper?
A) Co
B) Cu
C) Cr
D) Ce
- 25. Which element has the highest melting point?
A) Gold
B) Tungsten
C) Copper
D) Iron
- 26. What is the most reactive nonmetallic element?
A) Fluorine
B) Chlorine
C) Oxygen
D) Nitrogen
- 27. Which element is commonly used in photography?
A) Gold
B) Platinum
C) Palladium
D) Silver
- 28. What is the symbol for the chemical element potassium?
A) K
B) Pm
C) Pt
D) Po
- 29. Which element is used in car batteries?
A) Zinc
B) Lithium
C) Nickel
D) Lead
- 30. What element is used in fireworks to produce a bright green color?
A) Barium
B) Strontium
C) Sodium
D) Calcium
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