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1. The electronic configuration of an element M is 2, 8, 4. In the modern periodic table, the element M is placed in

A. 14_th group B. 4_th group C. 2_nd group D. 18_th group

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2. What happens to the electropositive character of elements on moving from left to right in a periodic table?

A. Decreases B. Increase C. First decreases, then increases D. First increases, then decreases

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3. Boron is a non-metal and is placed under group 13 and period 2. How can boron form bonds with other elements?

A. By sharing 2 electrons B. By sharing 3 electrons C. By sharing 1 electron D. By sharing 5 electrons

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4. Which of the following elements has 2 shells, and both are completely filled?

A. Helium B. Calcium C. Boron D. Neon

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5. Which of the following is the correct order of the atomic radii of the elements oxygen, fluorine and nitrogen?

A. O < N < F B. F < O < N C. O < F < N D. N < F < O

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6. What is the order of the metallic character down the group?

A. It increases as electrons move away from the nucleus B. It decreases as new shells are added to the element C. It increases as new atoms are added to the same shell D. It decreases as the effective nuclear charge on the electron increases

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7. A student learns that the atomic size depends on the atomic radius of the elements. How does the atomic radius of elements in the third-period change as one goes from sodium to argon?

A. Atomic radius decreases from sodium to argon B. Atomic radius decreases due to the addition of new shells C. Atomic radius increases as new shells are added D. Atomic radius increases from sodium to argon

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8. Element X forms a chloride with the formula XCl₂, which is solid with a high melting point. X would most likely be in the same group of the Periodic Table as:

A. Si B. Mg C. Na D. Al

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9. Which of the following option describes the achievements of Mendeleev’s Periodic Table?

A. It eliminated the blank spaces left in the table B. Predicting that the elements can be arranged based on their properties C. An element in a trend has an average atomic mass of the elements above and below it D. Prediction of noble gases

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10. Which of the following is the most reactive element of group 17?

A. Magnesium B. Sodium C. Fluorine D. Oxygen

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11. Electronegativity is defined as the ability of an element to form bonds by gaining electrons. How does the electronegativity of elements vary across the periods?

A. It decreases as the number of shells decreases B. It increases as the number of shells increases C. It decreases as more electrons are added to the same shell D. It increases as more electrons are added to the same shell

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12. Which group elements are called transition metals?

A. Group number 3 to 12 B. Group number 13 to 18 C. Group number 1 to 8 D. Group number 1 to 2

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13. What is the other name for group 18_th elements?

A. Halogens B. Alkali earth metals C. Alkali metals D. Noble gases

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14. Which of the following forms the basis of the modern periodic table?

A. Atomic mass B. All of the above C. Atomic number D. Number of nucleons