17Manganese has how many protons, electrons, and neutrons?
18Which group of elements have no definite shape or volume?
19This nonmetal has a valence number of one and is very reactive
20An atom’s valence electrons are those electrons that: A: are repelled by the nucleusB: prevent atoms from bondingC: have the highest energy levelD: are held most tightly
21How many total atoms are in CaCO3? What is the Formula Mass?What % is Carbon?
22An atom of Aluminum was found to have 13 protons, 10 electrons, and 14 neutrons. Is this Aluminum atom an Ion or an Isotope?
23Which of the following is found farthest from the center of an atom? A: protonB: neutronC: electronD: nucleus
24An element that has the same number of protons but a different number of neutrons is known as a(n)…..A: IsotopeB: IonC: Completely different elementD: Compound
25Which of the following best describes an atom? A: p+ & e- grouped together in a random patternB: a core of p+ & n’s surrounded by e-C: p+ & e- grouped together in an alternating patternD: a core of e- & n’s surrounded by p+’s
26Iron oxides, such as rust, form when iron reacts with oxygen in the air. What are the chemical symbols for the 2 elements found in iron oxide?A: I & OB: Ir & OC: Fe & OD: Pb & O
27What do the elements sulfur, nitrogen, phosphorus & bromine have in common? B: They are noble (inert) gasesA: They have the same thermal conductivityC: They have the same number of protonsD: They are nonmetals
28Which class of elements best conducts electricity? A: semimetalsB: nonmetalsC: noble (inert) gasesD: metals
29What is a pure substance that is made from 2 or more elements? A: HomogeneousMixtureB: SolutionC: HeterogeneousMixtureD: Compound