Chemistry Review MC _2

Chemistry Review MC _2 - 26 35 45 5(a What is an ion(b...

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Science 9 Chemistry Review Final Exam 2006 Part 2: Short Answer Questions 1. In most periodic tables, hydrogen appears in the same column as the alkali metals. (a) Explain why hydrogen should appear in this column. (b) Explain why hydrogen is not considered to be a member of the alkali metal group. 2. Write a sentence describing how the elements in a group in the modern periodic table are related. 3. Write a short paragraph describing what is common about the electron arrangement of (a) the alkali metals. (b) the halogens. 4. Complete the blanks in the following table. atomic mass number of number of number of number number protons electrons neutrons 9 19 ? ? ? ? ? 20 ? 21 ? 56
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Unformatted text preview: ? 26 ? 35 ? ? ? 45 5. (a) What is an ion? (b) Explain how an atom becomes a positive ion. (c) Explain how an atom becomes a negative ion. Write your answer in complete sentences. 6. Fill in the blanks in the following sentences. (a) Protons are ______________ charged particles. (b) The mass of a proton is approximately equal to the mass of a ________________. (c) The neutron is a _____________ particle found in the _______________ of an atom. (d) In all atoms, the number of ________________ is equal to the number of _______________. (e) Most of the mass of an atom is contained in the __________________. (f) The lightest particles in an atom are ____________________....
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