College Prep Chemistry Chapter 3 Review Name________________________________ A. Completion. Write the correct word(s) to complete each statement below. 1. All matter is composed of discrete, indestructible_________________. 2. Thomson model of the atom is known as the __________ __________ model. 3. Rutherford used ____________ ______________ to bombard gold foil in his famous experiment. 4. The three major subatomic particles are_________, _________, and_______________. 5. The atomic number is the number of ______________in an atom. 6. The small dense center of the atom is called the ______________, and it contains the ____________and _______________. 7. ____________are atoms with the same atomic number but different mass numbers. 8. An atom of 13C contains ___________protons, ______electrons, and _____neutrons. 9. To determine the number of neutrons in an atom, the ___________number is subtracted from the _______________number. 10. The ____________ __________ of an element is the weighted average of all of the isotopes of that element. 11. The vertical columns in the periodic table are called___________, and the horizontal rows are called____________. 12. The elements in group IIA of the periodic table are known as the_________ ________metals. 13. The atomic radii of the elements _____________going from left to right and _____________going from top to bottom in the periodic table. 14. The name of the element with the symbol K is ____________. 15. The ________________ _____________is the minimum energy required to remove the outermost electron from a neutral atom. 16. An atom that has lost 3 electrons has a charge of ____________. 17. Positively charged ions are called______________, and negatively charged ions are called ____________. B. True-False. Indicate whether each statement below is true or false, and explain why the false statements are false. _________1. All the atoms of a particular element are exactly alike. _________2. All the atoms of carbon contain 6 protons. _________3. The atomic mass of an element is the sum of its protons and neutrons. _________4. All of the atoms of nitrogen contain 7 neutrons. _________5. Isotopes are atoms that have the same number of protons but different numbers of electrons. _________6. In the modern periodic table, the elements are arranged according to increasing atomic mass. _________7. Anions are ions that contain more protons than electrons. C. Questions and problems 1. Explain why Dalton’s statement that “ all atoms of a particular element are exactly alike” is false. 2. Write the symbols for the following elements: a. helium b. potassium c. sodium d. iron e. silver f. gold 3. Indicate the number of protons, neutrons, and electrons in an atom of each of the following isotopes: a. 200At b. 108Ag c. 15N d. 23Na 4. Write the full atomic symbol and the abbreviated symbol for each of the following: a) A carbon atom that contains 8 electrons b) A hydrogen atom with a mass number of 3 5. Identify each of the subatomic particles described below: a. -1 charge, mass= 1/1867 b. 0 charge, mass=1 c. +1 charge mass =1 6. Calculate the atomic mass of bromine. Br is composed of two isotopes, 79Br 50.5 % abundant and mass 78.9amu and 81Br 49.5% abundant with a mass of 80.92amu. 7. Arrange the following elements in order of increasing atomic radius ( from smallest to largest) Explain your order. N, As, O, F, and P 8. Arrange the elements in problem 7 in order of decreasing ionization energy.