اختبار ساينس Science - اولى اعدادي -مقرر اكتوبر -نموذج 2

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

1. Ancient Greek philosophers believed that matter was made up of small, indivisible parts called Atoms
   • أ. Atoms
   • ب. Particles
   • ج. Molecules
   • د. Atomic particles
2. The atomic number is the number of protons an atom contains
   • أ. True
   • ب. False
3. How do you find the number of neutrons in an atom ?
   • أ. mass number- atomic number
   • ب. atomic number- mass number
   • ج. mass number+ atomic number
   • د. atomic number X mass number
4. How many electrons can each level hold?
   • أ. 1st = 2 2nd = 8 3rd = 18
   • ب. 1st = 4 2nd = 8 3rd = 18
   • ج. 1st = 2 2nd = 8 3rd = 8
   • د. 1st = 2 2nd = 4 3rd = 18
5. The subatomic particle with no electrical charge is the ........
   • أ. neutron
   • ب. electron
   • ج. proton
   • د. A+c
6. The subatomic particle with a positive charge is the …………
   • أ. proton
   • ب. neutron
   • ج. electron
   • د. b+c
7. The subatomic particle with a negative charge is the
   • أ. electron
   • ب. proton
   • ج. neutron
   • د. b+c
8. There are the same number of these two particles in an atom
   • أ. proton
   • ب. neutron
   • ج. electron
   • د. A + C
9. The atomic number is the same as the number of
   • أ. proton
   • ب. neutron
   • ج. electron
   • د. b+c
10. Where is most of the mass of an atom located?
    • أ. Nucleus
    • ب. electron
    • ج. neutron
    • د. proton
11. The nucleus is the smallest part of the atom and takes up the least space
    • أ. False
    • ب. True
12. The electrons are the lightest in weight of the three subatomic particles
    • أ. True
    • ب. False
13. Electrons are present in the nucleus
    • أ. False
    • ب. True
14. What does the atomic mass represent?
    • أ. PROTONS + NEUTRONS
    • ب. PROTONS - NEUTRONS
    • ج. PROTONS
    • د. NEUTRONS
15. The number of negative electrons in the atom in its normal state equals
    • أ. number of protons
    • ب. twice the number of protons
    • ج. half the number of neutrons
    • د. number of neutrons
16. The outmost energy level of any atom does not contain more than
    • أ. 8 electrons
    • ب. 8 neutrons
    • ج. 4 electrons
    • د. 6 electrons
17. The masses of subatomic components in the atomic mass units are measured in atomic mass units ( u)
    • أ. True
    • ب. False
18. The mass of the electrons is neglected in calculation of the atomic mass
    • أ. True
    • ب. False
19. There are …….. main energy levels
    • أ. 7
    • ب. 8
    • ج. 6
    • د. 9
20. The number of electrons required to saturate the first four levels of energy can be determined by the mathematical relationship
    • أ. (2n2 )
    • ب. (2n3 )
    • ج. ( n2 )
    • د. (3n2 )
21. When the elements differ between English and Latin name its symbol is taken from its
    • أ. Latin name
    • ب. English name
    • ج. Latin name & English
    • د. capital English
22. In NPK fertilizer. The element needed to developing strong roots is Nitrogen
    • أ. False
    • ب. True
23. The mass number is represented by the symbol A and is written at the ……….side of the element symbol
    • أ. upper left
    • ب. lower right
    • ج. lower left
    • د. upper right
24. The atomic number is represented by the symbol Z and is written at the ….side of the element symbol
    • أ. lower left
    • ب. lower right
    • ج. upper left
    • د. upper right
25. The fertilizer NPK composed of three compound containing the elements
    • أ. phosphorus , Nitrogen, potassium
    • ب. phosphorus , Nitrogen, calcium
    • ج. phosphorus , Nitrogen, carbon
    • د. Nitrogen, potassium ,calcium
26. ……..revolve around the nucleus at different energy level according to their energy
    • أ. electrons
    • ب. protons
    • ج. neutrons
    • د. A + C
27. In NPK fertilizer. The element needed for the greening of plant leaves is:
    • أ. Nitrogen
    • ب. Phosphorus
    • ج. Calcium
    • د. Potassium
28. …….. formulated the first scientific theory about the atom its
    • أ. Dalton
    • ب. Bohr
    • ج. Rutherford
    • د. Newton
29. In NPK fertilizer. The element necessary for healthy growth of the plant is phosphorus
    • أ. False
    • ب. True
30. Isotopes are the atoms of an element with different numbers of protons but the same number of neutrons
    • أ. False
    • ب. True
31. fertilizer are chemical compounds used to improve the agricultural crops
    • أ. True
    • ب. False
32. Dalton formulated the first scientific theory about the atom, showing that the atoms are divisible
    • أ. False
    • ب. True
33. A neutral atoms has 85 protons and 125 neutrons What is its atomic number.........
    • أ. 85
    • ب. 210
    • ج. 125
    • د. 40
34. A neutral atoms has 85 protons and 125 neutrons What is its mass number
    • أ. 210
    • ب. 125
    • ج. 85
    • د. 40
35. A neutral atoms has 85 protons and 125 neutrons How many electrons does atoms has?
    • أ. 85
    • ب. 210
    • ج. 125
    • د. 40