Semester 1 Review Packet

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$CAHSEE Math Problem of the Day -- Week 3$




$CAHSEE Math Problem of the Day - Week 2$

____ 13. To two significant figures, the measurement 0.0255 g should be reported asa. 0.02 g. c. 0.026 g.b. 0.025 g. d. 2.5 x 10 2 g.____ 14. The number of significant figures in the measurement 0.000 305 kg isa. 3. c. 5.b. 4. d. 6.____ 15. The measurement that has been expressed to three significant figures isa. 0.052 g. c. 3.065 g.b. 0.202 g. d. 5000 g.____ 16. The number of significant figures in the measurement 170.040 km isa. 3. c. 5.b. 4. d. 6.____ 17. When 64.4 is divided by 2.00, the correct number of significant figures in the result isa. 1. c. 3.b. 2. d. 4.____ 18. Divide 5.7 m by 2 m. The answer is correctly reported asa. 2.8 m. c. 2.9 m.b. 2.85 m. d. 3 m.____ 19. The product of 13 cm and 5.7 cm is correctly reported asa. 74 cm 2 . c. 74.1 cm 2 .b. 74.0 cm 2 . d. 75 cm 2 .____ 20. An ionic bond is a result ofa. sharing electrons c. deleting electronsb. trasfering electrons d. reducing electrons____ 21. A covalent bond is a result of...a. sharing electrons c. deleting electronsb. transfering electrons d. reducing electrons____ 22. An ionic bond is made of...a. two metals c. two halogensb. two nonmetals d. a metal and a nonmetal____ 23. A covalent bond is made of...a. two nonmetals c. two alkaline elementsb. two metals d. a metal and a nonmetal____ 24. A positively charged ion is also called a(n)a. anion c. monoatomic ionb. cation d. polyatomic ion____ 25. A negatively charged ion is also called a(n)a. anion c. monoatomic ionb. cation d. polyatomic ion2008
____ 26. An ion that consists of one charged atom is called a(n)a. anion c. monoatomic ionb. cation d. polyatomic ion____ 27. An ion that consists of many atoms that share a charge is called a(n)a. anion c. monoatomic ionb. cation d. polyatomic ion____ 28. The electrons involved in the formation of a chemical bond are calleda. dipoles c. Lewis electronsb. s electrons d. valence electrons____ 29. In most compounds, atoms of main-group elements form bonds so that the number of electrons inthe outermost energy levels of each atom isa. 2 c. 8b. 6 d. 10____ 30. The elements of the ____________ group have full outer energy levels without forming bonds.a. main c. alkali metalb. noble gas d. alkaline-earth metal____ 31. Molecular (covalent) compounds __________________ than ionic compounds.a. have higher boiling points c. have lower melting pointsb. are more brittle d. are harder____ 32. The partial charges formed in polar compounds are calleda. dipoles c. Lewis chargesb. ions d. valence electrons____ 33. VSEPR theory is used to determinea. which elements will bond. c. the shape of a molecule.b. the type of bond formed. d. the charge of a transition metal.____ 34. Why do atoms form chemical bonds?a. To gain energy c. To move fasterb. To become more stable d. To increase vibration____ 35. What is an ionic bond?a. the atoms share electrons evenly c. the atoms share electrons, but notevenlyb. the atoms take or give electrons d. the atoms give or take protons____ 36. Ionization energy isa. the energy needed to add an electron. c. the energy needed to remove anelectron.b. the energy needed to form a bond. d. the energy needed to break a bond.____ 37. The trend for Ionic Radius across the period wasa. Increase c. Decrease, sharply Increase thenDecreaseb. Decrease d. Stays constant.2008
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Semester 1 Review Packet

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