امتحان - ساينس - الترم الثاني - اولى اعدادي - مقرر مارس - المنهج المصري الجديد

هذه معاينة نصية للأسئلة للاطّلاع والمراجعة فقط. لخوض الاختبار تفاعليًّا مع تصحيح آلي ونتيجة فورية، اضغط زر «ابدأ الاختبار» أدناه.

1. Which of the following is a characteristic electron configuration of the last energy level in most metals?
   • أ. 1, 2, or 3 electrons
   • ب. 5, 6, or 7 electrons
   • ج. 8 electrons
   • د. 4 electrons
2. Which of the following statements is true regarding the physical state of metals and nonmetals?
   • أ. All metals are solids except mercury, which is a liquid.
   • ب. Nonmetals are only gases.
   • ج. Nonmetals are either solids or liquid , except bromine, which is a gas.
   • د. All metals are liquids except mercury, which is a solid.
3. Which property is most likely to be observed in a metallic element compared to a nonmetallic element?
   • أ. Metallic luster
   • ب. Brittle texture
   • ج. Non-conductive nature
   • د. Low density
4. Which of the following properties is typically found in metals but not in nonmetals?
   • أ. Ductility
   • ب. Formability
   • ج. Malleability
   • د. All of the above
5. Which of the following metals is known for its metallic luster and ductility?
   • أ. Sodium
   • ب. Graphite
   • ج. Sulfur
   • د. Carbon
6. What is a common characteristic of nonmetals like carbon and sulfur?
   • أ. Brittleness and opacity
   • ب. High electrical conductivity
   • ج. Metallic luster
   • د. High thermal conductivity
7. Which of the following is an exception among nonmetals due to its use in dry cells and ability to conduct electricity?
   • أ. Carbon in the form of graphite
   • ب. Sodium
   • ج. Sulfur
   • د. Copper
8. How do metals typically differ from nonmetals in terms of physical properties?
   • أ. Metals are good electrical and thermal conductors.
   • ب. Nonmetals are ductile and malleable.
   • ج. Nonmetals have high melting points.
   • د. Metals are brittle and non-lustrous.
9. Which of the following best describes the appearance of most metals compared to nonmetals?
   • أ. Shiny with metallic luster
   • ب. Always liquid at room temperature
   • ج. Opaque with no luster
   • د. Transparent
10. Which property is characteristic of metals that helps in their usage in wiring and cookware?
    • أ. Thermal conductivity
    • ب. Insulation properties
    • ج. Brittleness
    • د. Solubility in water
11. Among the following, which is not a characteristic feature of metals?
    • أ. High electrical resistance
    • ب. Ability to form alloys
    • ج. Malleability
    • د. Ductility
12. What property of metals allows them to be drawn into wires?
    • أ. Ductility
    • ب. Opacity
    • ج. Brittleness
    • د. Poor thermal conductivity
13. What is the arrangement of atoms in solid metals known as?
    • أ. Metallic crystal lattice
    • ب. Molecular lattice
    • ج. Ionic lattice
    • د. Covalent lattice
14. In the structure of a metallic crystal lattice, what role do the valence electrons play?
    • أ. They move freely within the lattice.
    • ب. They are completely absent.
    • ج. They form covalent bonds between metal ions
    • د. They are tightly bound to individual atoms.
15. What term describes the force of attraction in a metallic bond?
    • أ. The attraction between positive metal ions and a cloud of free-moving valence electrons
    • ب. The repulsive force between negative ions.
    • ج. The ionic bond between lattice structures
    • د. The attraction between neutral atoms.
16. In metallic bonds, the metal atoms are:
    • أ. Charged as cations.
    • ب. Charged as anions.
    • ج. Not present as individual entities
    • د. Neutral.
17. What is responsible for the high melting points and hardness of metals?
    • أ. Metallic bonds
    • ب. Hydrogen bonds
    • ج. Ionic bonds
    • د. Covalent bonds
18. How does the number of valence electrons affect the hardness of metals?
    • أ. Hardness increases with an increase in valence electrons.
    • ب. The number of valence electrons has no effect on hardness.
    • ج. Hardness is only affected by atomic mass.
    • د. Hardness decreases with an increase in valence electrons.
19. Which property of metals is directly influenced by metallic bonds?
    • أ. High melting points
    • ب. Electrical insulation
    • ج. Low density
    • د. Solubility in water
20. Why are pure metals often combined to form alloys for industrial use?
    • أ. Pure metals are soft and unsuitable for most industrial applications.
    • ب. Pure metals are too expensive.
    • ج. Pure metals are non-conductive
    • د. Pure metals are too hard
21. What is an alloy?
    • أ. A mixture of two or more metals or metals with nonmetals, which does not have a molecular formula
    • ب. A synthetic metal
    • ج. A compound of a metal and a nonmetal
    • د. A pure metallic element
22. Which metals primarily compose bronze, an alloy used in jewelry and statues?
    • أ. Copper (95%) and tin (5%)
    • ب. Copper and silver
    • ج. Copper and nickel
    • د. Copper and zinc
23. What is a characteristic feature of bronze compared to pure copper?
    • أ. Bronze is harder than copper and does not rust.
    • ب. Bronze has a lower melting point than copper
    • ج. Bronze rusts more easily than copper
    • د. Bronze is softer than copper
24. How are alloys typically expressed in terms of composition?
    • أ. As mixtures, usually not expressed in molecular formulas
    • ب. Through their crystalline structures
    • ج. As homogeneous mixtures without fixed ratios
    • د. Using molecular formulas
25. What is the primary application of bronze alloy ?
    • أ. Jewelry, medals, and statues
    • ب. Aerospace components
    • ج. Automotive parts
    • د. Electrical wiring
26. What is the process of converting waste materials into new usable substances known as?
    • أ. Recycling
    • ب. Reprocessing
    • ج. Digestion
    • د. Composting
27. Why are metals like copper, aluminum, and iron commonly recycled?
    • أ. Their percentage in the earth’s crust decreases, and recycling is cheaper than extracting from ores
    • ب. Recycling is often more expensive than extraction
    • ج. It is easy to extract them from their ores
    • د. They are abundant in the earth’s crust
28. Which of the following is a reason for recycling metals rather than extracting them from ores?
    • أ. It is difficult and costly to extract them from their ores
    • ب. Extracted metals are purer
    • ج. Metals are unlimited in ores
    • د. Recycling requires more energy
29. All the following are properties of the sodium element, except ................
    • أ. bad electrical conductor
    • ب. formable
    • ج. has metallic luster
    • د. a metal
30. Which of the following is the correct arrangement of the hardness of sodium 11Na, magnesium 12Mg, and aluminum 13Al?
    • أ. Mg > Na > Al
    • ب. Al > Na > Mg
    • ج. Al > Mg > Na
    • د. Na > Mg > Al
31. Element (X) its boiling point is 2807°C and its melting point is 1064°C. Which of the following is a property of element (X)?
    • أ. Ductile
    • ب. Opaque
    • ج. Brittle
    • د. Bad electrical conductor
32. Which of the following questions helps in the classification of some elements to metals and nonmetals?
    • أ. Is it brittle?
    • ب. Is it colored?
    • ج. Is it liquid?
    • د. Is it solid?
33. What is the common property of both sodium and copper?
    • أ. Physical state
    • ب. Melting point
    • ج. Density
    • د. Colour
34. Metals are typically malleable, meaning they can be hammered or rolled into thin sheets without breaking
    • أ. True
    • ب. False
35. Nonmetals are usually brittle and lack the malleability and ductility of metals
    • أ. True
    • ب. Flase