General Chemistry(2003)🧪

اسئلة النصفي

حل اسئلة دور الأول كيمياء عامة

هذه الإجابة على الأسئلة 1. a) Lithium. 2. b) top to bottom within a group. 3. b) Number of neutrons in the nucleus. 4. b) It increases as you move from left to right across a period. 5. a) is equal to half its bond length with another atom. 6. a) Oxygen. 7. d) Silicon. 8. b) They decrease. 9. a) They increase. 10. c) Increases from left to right and decreases from top to bottom.

1. Which of the following elements has the largest atomic radius? a) Lithium b) Beryllium c) Boron d) Carbon 2. Atomic radius generally increases as you move: a) left to right across a period b) top to bottom within a group c) diagonally across the periodic table d) none of the above 3. Which of the following factors does not affect atomic radius? a) Number of protons in the nucleus b) Number of neutrons in the nucleus c) Number of electrons in the outermost shell d) Nuclear charge 4. Which of the following statements is true regarding atomic radius? a) It decreases as you move down a group. b) It increases as you move from left to right across a period. c) It is directly proportional to nuclear charge. d) It is inversely proportional to electron affinity. 5. The atomic radius of an atom: a) is equal to half its bond length with another atom. b) is always smaller than its ionic radius. c) decreases when it gains an electron. d) increases when it loses an electron. 6. Which element has a smaller atomic radius than sulfur? a) Oxygen b) Selenium c) Tellurium d) Polonium 7. Which of the following elements has the smallest atomic radius? a) Sodium b) Magnesium c ) Aluminum d ) Silicon 8. What happens to atomic radii as you go from left to right across a period? a ) They increase b ) They decrease c ) They remain constant d ) None of these 9. What happens to atomic radii as you go down a group in periodic table? a ) They increase b ) They decrease c ) They remain constant d ) None of these 10. What is the trend of atomic radius in the periodic table? a ) Increases from left to right and top to bottom b ) Decreases from left to right and top to bottom c ) Increases from left to right and decreases from top to bottom d ) Decreases from left to right and increases from top to bottom