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1st 9 WEEKS CHEMISTRY FINAL EXAM REVIEW
1. Which list of elements consist of a metal, metalloid, and a nonmetal: (A) Mg, Sr, Ra (B) Nb, Mo, Ag (C) Ar, Kr, Xe (D) Se, Te, Po
2. What is the most likely electronegativity value for a metallic element?
(A) 1.0 (B) 3.0 (C) 2.2 (D) 4.0
3. Element X reacts with Fluorine to form an ionic compound that has the formula XF2. To which group on the Periodic Table could element X belong?
(A) Group 1 (B) Group 3 (C) Group 15 (D) Group 2
4. Which general trend is found in Period 2 as the elements are considered in order of decreasing atomic number?
(A) increasing atomic radius (B) increasing electronegativity
(C) increasing atomic mass (D) increasing first ionization energy
5. In the ground state, which atom has a completely filled valence electron shell?
(A) Si (B) Kr (C) Ti (D) Pb
6. The majority of the elements in Group 1 are classified as
(A) metals (B) nonmetals (C) metalloids (D) noble gases
7. Which list includes elements with the most similar chemical properties?
(A) Cr, Th, Pr (B) Sc, Ti, V (C) Se, Br, Kr (D) N, P, As
8. Which element has the lowest electronegativity value?
(A) Ni (B) Si (C) Ra (D) F
9. Which class of compounds contains at least one element from Group 17 of the Periodic Table?
(A) aldehyde (B) ester (C) amine (D) halide
10. What is the total number of neutrons in an atom of phosphorus-32?
(A) 18 (B) 10 (C) 16 (D) 8
11. What is the net charge of an ion that has 19 protons, 20 neutrons, and 18 electrons?
(A) 1+ (B) 1− (C) 2+ (D) 2−
12. Which two physical properties allow a mixture to be separated by chromatography?
(A) hardness and boiling point (B) density and specific heat capacity
(C) malleability and thermal conductivity (D) solubility and molecular polarit
13. Which statement compares the masses of two subatomic particles?
(A) The mass of an electron is greater than the mass of a proton.
(B) The mass of an electron is greater than the mass of a neutron.
(C) The mass of a proton is less than the mass of an electron.
(D) The mass of a proton is equal to the mass of a neutron.
14. Explain, in terms of electron shells, why the radius of a K+ ion is greater than the radius of a Na+ ion.
15. State the relationship between atomic number and first ionization energy as the elements in Group 2 are considered in order of increasing atomic number.
16. A gold-colored ring has a mass of 18.9 grams and a volume of 1.12 mL. What is the density of the ring and is the ring pure gold? (The density of gold is 19.3 g/mL)
17. What is the difference between a physical and chemical change?
18. What are the differences between a homogeneous and heterogeneous mixture?
19. How would you know that a chemical reaction/change took place when substances are combined?
20. How would you know that a physical change took place when substances are combined?