Chapter 4 Practice Questions

1) Which of the following statements about atoms is FALSE? A) Atoms compose all matter. B) Atoms are responsible for the sensation of smell. C) Atoms are the basic building block of nature. D) An atom is the smallest identifiable unit of an element. E) All of the above statements are true.

2) Which statement below accurately describes the contributions of Dalton? A) ancient Greek philosopher who proposed that matter was continuous B) created the modern periodic table C) proposed the modern Atomic Theory D) discovered the existence of electrons E) none of the above

3) Which statement below accurately describes the contributions of Thomson? A) ancient Greek philosopher who proposed that matter was continuous B) created the modern periodic table C) proposed the modern Atomic Theory D) discovered the existence of electrons E) none of the above

4) Which statement below is NOT consistent with the nuclear theory of the atom as proposed by Rutherford? A) Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus. B) Electrical charge is a fundamental property of protons and electrons in which like charges repel and opposite charges attract. C) Most of the volume of the atom is empty space occupied by tiny, negatively charged electrons. D) There are as many electrons outside the nucleus as there are protons inside the nucleus in a neutral atom. E) All of the above statements are consistent.

5) An atom containing 7 protons, 8 neutrons, and 7 electrons: A) is charge-neutral. B) is an ion. C) is an oxygen atom. D) cannot exist. E) none of the above

6) Which of the following statements about the nature of electrical charge is FALSE? A) Electrical charge is a fundamental property of protons and electrons. B) Positive and negative electrical charges attract each other. C) Positive-positive or negative-negative charges repel each other. D) Positive and negative charges cancel each other so that a proton and electron, when paired, are charge neutral. E) All of the above statements are true.

13) Which of the following elements has an atomic number of 4? A) H B) C C) He D) Be E) none of the above

7) What is the atomic symbol for silver? A) S B) Ag C) Au D) Si E) none of the above

8) What is the correct chemical symbol for mercury? A) Hm B) Hy C) Me D) My E) none of the above

9) Which of the following is NOT a correct name, symbol combination? A) beryllium, Be B) phosphorus, P C) iron, Fe D) manganese, Mg E) silicon, Si

10) The names of the elements whose symbols are Si, P, Mn, and S are respectively: A) silicon, potassium, magnesium, and sulfur. B) silver, phosphorus, magnesium, and sulfur. C) silicon, phosphorus, manganese, and sulfur. D) silicon, phosphorus, magnesium, and sulfur. E) silicon, potassium, magnesium, and sodium.

11) Metals are located where on the periodic table? A) left side B) right side C) middle D) zig-zag diagonal line E) none of the above

12) Metalloids are located where on the periodic table? A) left side B) right side C) middle D) zig-zag diagonal line E) none of the above

13) Group 7A elements are also called: A) noble gases. B) halogens. C) alkaline earth metals. D) alkali metals. E) none of the above

15) Xe is a member of which family? A) noble gases B) halogens C) alkaline earth metals D) alkali metals E) none of the above

16) Cr is a member of which family? A) noble gases B) halogens C) alkaline earth metals D) alkali metals E) none of the above

17) Identify the element that is a nonmetal, a gas, and has an elemental symbol that starts with the letter "A." A) Ac B) Ar C) Au D) Al E) none of the above

18) When an atom loses an electron, the resulting particle is called: A) a proton. B) an anion. C) a cation. D) an isotope. E) none of the above

19) Which of the following statements about ions is INCORRECT? A) Cations are positive ions and anions are negative ions. B) Cations are formed when an atom loses electrons. C) Anions are formed when an atom gains electrons. D) Cations always have the same number of protons as electrons. E) All statements are correct.

20) How many electrons are in Br-? A) 4 B) 7 C) 34 D) 36 E) none of the above

21) What is the charge on the barium ion? A) 1- B) 2- C) 1+ D) 2+ E) none of the above

22) There is very little of the element astatine (symbol = At) on earth. If astatine formed an ion, it would most likely have the charge of: A) 1+ B) 1- C) 2+ D) 2- E) none of the above

23) What is the charge on the cesium ion? A) 1- B) 2- C) 1+ D) 2+ E) none of the above

24) Isotopes are: A) atoms of the same element that have different number of neutrons. B) atoms of the same element that have different number of protons. C) atoms of the same element that have different number of electrons. D) atoms of the same element that have the same number of neutrons. E) none of the above

25) The nucleus of an atom consists mainly of: A) neutrons and electrons. B) protons and electrons. C) protons and neutrons. D) protons, neutrons, and electrons. E) none of the above

26) How many neutrons are present in C-14? A) 14 B) 12 C) 6 D) 8 E) none of the above

27) How many protons and neutrons are in Cl-37? A) 20 protons, 17 neutrons B) 17 protons, 37 neutrons C) 17 protons, 20 neutrons D) 37 protons, 17 neutrons E) none of the above

28) An atom of a carbon-14 isotope would contain: A) 6 protons, 8 neutrons, and 6 electrons. B) 8 protons, 6 neutrons, and 8 electrons. C) 6 protons, 8 neutrons, and 8 electrons. D) 14 protons, 6 neutrons, and 6 electrons. E) 20 protons, 6 neutrons, and 20 electrons.

29) A specific isotope of an element is known to have 15 protons and 16 neutrons. Which symbol would properly represent this isotope? A) 15/31 Ga B) 31/15 P C) 16/15 X D) 31/16 S E) none of the above

30) A fictional element has two naturally occurring isotopes with the natural abundances shown here: ISOTOPE ABUNDANCE 16 50.0% 18 50.0% Which statement is TRUE for this element? A) The atomic mass would be 16. B) The atomic mass would be less than 16. C) The atomic mass would be 18. D) The atomic mass would be more than 18. E) The atomic mass would be 17.

31) A fictional element has two isotopes, each making up 50% of the population. Isotope 1 has a mass of 80.0 amu, Isotope 2 has a mass of 85.0 amu. Calculate the atomic mass of the fictional element. A) 82.5 amu B) 42.5 amu C) 40 amu D) 165 amu E) none of the above

32) The elemental symbol Mn represents the element ________. A) mendelevium B) magnesium C) molybdenum D) manganese E) meitnerium F) none of the above

33) A fictional element named Nivadium is found to have three naturally occurring isotopes with the natural abundances shown here: MASS (amu) ABUNDANCE 22.1760 45.00% 23.1847 45.00% 24.1934 10.00% The calculated atomic mass of Nivadium is: A) 7.61 amu B) 22.83 amu C) 23.18 amu D) 69.55 amu E) none of the above

34) What is the charge on an ion that has an atomic number of 24 and contains 22e-? A) 2+ B) 2- C) 1+ D) 1- E) none of the above

35) How many neutrons are found in Ne-21? A) 11 B) 21 C) 10 D) 0 E) none of the above

36) If an isotope of an element has 27 neutrons and a mass number of 52, how many electrons must it have? A) 25 B) 27 C) 52 D) 79 E) none of the above