Use the Periodic Table of Elements to answer the following question(s). Which sentence about the periodic table of elements is true? A. All elements in period 2 are metals. B. All elements in group 18 are metals. C. Metals are found on the left side of the periodic table. D. Metals are found on the right side of the periodic table. What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (Br) have in common? A. They are noble (inert) gases. B. They are nonmetals. C. They have the same thermal conductivity. D. They have the same number of protons.
Which of the following ordered pairs of elements shows an increase in atomic number but a decrease in average atomic mass? A. Ag to Pd B. Co to Ni C. Ge to Sn D. Cr to Mo Which of the following is the most important factor in determining an element s place in the periodic table? A. Number of protons B. Number of neutrons C. Atomic Charge D. Atomic Density
The atomic number of iron is 26, and the atomic mass is 55.847. What do these numbers mean in regard to protons, electrons and neutrons? A. There are 26 each of protons and neutrons, and the rest of the mass is the result of electrons. B. There are 26 protons and 26 electrons. Some atoms of iron have 29 neutrons; the.847 shows that there is more than one isotope of iron. C. There are 26 protons and 29 neutrons. Each particle has an atomic mass of 1. D. There are 26 protons and 26 neutrons. Since neutrons have slightly more mass than protons, the mass is greater than 52. Different elements are most likely to react in similar ways when they. A. are members of the same period B. are members of the same group C. have nearly the same atomic mass D. have the same number of neutrons
What is the smallest particle of the element gold (Au) that can still be classified as gold? A. atom B. molecule C. neutron D. proton The atomic number of an element indicates which of the following? A. the number of neutrons in the atom B. the number of protons in the atom C. the sum of the neutrons and protons in the atom D. the sum of the protons and electrons in the atom
Which of the following statements describes the elements in family 16 of the periodic table? A. They have six valence electrons. B. They are all gases at room temperature. C. They exist commonly as cations in nature. D. They combine easily with elements in family 17. Which of the following elements is a metalloid? A. magnesium B. silicon C. phosphorus D. cobalt
Which of the following elements is a member of the halogen family and is located in period 3? A. argon (Ar) B. bromine (Br) C. chlorine (Cl) D. sulfur (S) Which of the following elements has both metallic and nonmetallic properties? A. Ar B. Ge C. Mg D. S
Why are elements considered the building blocks of all compounds? A. Elements can change into liquids or gases. B. Elements can change into smaller elements. C. Elements can combine to create different substances. An element on the far left side of the periodic table will have what property? A. a tendency to avoid reactions B. a tendency to share electrons when reacting C. a tendency to gain electrons when reacting D. a tendency to lose electrons when reacting
Why are the noble gases so unreactive? A. Their outer shell has 1 electron. B. Their outer shell has 2 electrons. C. Their outer shell is filled. D. Their outer shell needs one electron to be full. Which correctly lists four atoms from smallest to largest radii? A. I, Br, Cl, F B. F, I, Br, Cl C. Si, P, S, Cl D. Cl, S, P, Si
Suppose scientists discovered four new elements (W, X, Y, Z) while studying rock and soil samples brought back from a Mars mission. Which Lewis dot structure represents an element that should be placed in column VIIA (17) of the periodic table? A. B. C. D. Use the picture of an atom below to answer the question. Which statement best describes the part of the atom that is shown by the arrow? A. It is an electron, and it has a negative charge. B. It is an electron, and it has a positive charge. C. It is a proton, and it has a negative charge. D. It is a proton, and it has a positive charge.
Which of the following comparisons correctly describes subatomic particles? A. An electron has a negative charge and a mass larger than the mass of a proton. B. A neutron has a negative charge and a mass smaller than the mass of a proton. C. A neutron has a neutral charge and a mass larger than the mass of an electron. D. A proton has a positive charge and a mass smaller than the mass of an electron. Which best describes the current model of an atom? A. a solid sphere with electrons and protons embedded B. a solid sphere unique for everything that exists C. a central nucleus containing protons and neutrons with electrons orbiting in levels of high probability D. a central nucleus containing protons with electrons orbiting in specific paths