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Terms in this set (34)ALL atoms of the same element have: the same number of protons. If Atom #1 has 19 protons and 22 neutrons, and Atom #2 has 20 protons and 22 neutrons, are these isotopes of the same element? No, because they have different numbers of protons. The mass number indicates: the total number of protons and neutrons. Which element has a mass number of 12 and contains 6 neutrons? Carbon The nucleus of an atom: is positively charged. The nucleus of an atom is composed of _____. Protons and neutrons. Since an equal number of electrons are needed to balance the charge of the protons in the nucleus, how many protons and electrons are found in an atom of nitrogen (atomic number 7)? 7 protons, 7 electrons When locating the atomic number for an element on the periodic table, the atomic number can be found _____ the symbol for the element. above The atomic number gives the number of _____ in the nucleus of an atom. protons Elements in Group 2 are known as the _____. alkaline earth metals Which of the following can be found in the second period of the periodic table? Lithium (Li) Which of the following will react violently with water to form a base? Potassium (K) Which of the following is the poorest conductor of electricity? Fluorine (F) Which
element is found in the group described by the statement below? Iodine (I) Which of the following is not a way that metals are important to humans? They can be used as fuels for cars. Metals are generally _____ at room temperature. Solids Which of the following is true about the reactivity of metals? The reactivity of metals varies greatly. How do metals bond? By sharing electrons with other metal ions in what is called a sea of electrons. Which of the following defines a metal? Metals are lustrous and malleable. A metalloid conducts electricity well in hot temperatures, but acts more like an insulator when the temperatures are cooler. What is a good way to describe this property? A semiconductor Some metalloids, such as boron, have which type of texture? Brittle Where could you find materials made from metalloid elements in your home? Electronic devices Which of the following is NOT a metalloid? Bromine What happens when a metalloid gets heated up? It conducts more electricity, allowing electrons to move more freely. Where are nonmetals located on the periodic table? On the right side, except hydrogen, which is in the top left corner What is/are a likely product(s) of the reaction between a metal and a nonmetal? An ionic compound How do nonmetals generally react with each other? They form covalent bonds and share electrons with each other. Which of the following are characteristics used to define nonmetal elements? All of the answers are correct. The majority of nonmetals naturally occur as which state of matter? Gas Which of the following is NOT a noble gas? Hydrogen Noble gases were: Discovered later than most elements because they do not react or form compounds in nature Noble gases are: All of these Noble gases have all of the ... they need. This makes them avoid forming compounds and undergoing reactions. electrons Which noble gas is known to cause cancer? Radon Sets with similar termsChemistry Nine Weeks Study Guide127 terms chlo2cute Physical science final54 terms Jessica_Hanner Chemistry Exam54 terms bergquistaud Sets found in the same folderCh.115 terms Kerianne523 Ch.540 terms Kerianne523 Ch.1029 terms Kerianne523 Other sets by this creatorCh.9 ||World History|| 1-12 lessons55 terms Kerianne523 Ch.85 terms Kerianne523 Ch.8 Phys. Science41 terms Kerianne523 Ch.630 terms Kerianne523 Verified questionsPHYSICAL SCIENCE Why do nonpolar substances boil at relatively low temperatures? Verified answer
PHYSICAL SCIENCE How would it be possible for an object to be traveling with constant speed and still be accelerating? Verified answer
CHEMISTRY Find the boiling point of an aqueous solution containing a nonelectrolyte that freezes at $$ - 6.51 ^ { \circ } \mathrm { C } $$ . Verified answer
CHEMISTRY A water tank leaks water at the rate of 3.9 mL/h. If the tank is not repaired, what volume of water in liters will it in a year? Show your setup for solving this. Hint: Use one conversion factor to convert hours to days and another to convert days to years, and assume that one year has 365 days. Verified answer Recommended textbook solutions Chemical Reaction Engineering3rd EditionOctave Levenspiel 228 solutions Atkins Physical Chemistry10th EditionJulio de Paula, Peter Atkins 1,315 solutions Principles of Environmental Chemistry3rd EditionJames Girard 371 solutions Organic Chemistry9th EditionJohn E. McMurry 1,920 solutions Other Quizlet setsMICROBIOLOGY: CHAPTER 442 terms mikahgsheldonPLUS Bio 411 Exam 3124 terms sarahtepe American Government Final Exam31 terms melissaanymedina Related questionsQUESTION change in the atomic model over time 11 answers QUESTION What is the atomic mass of an element composed of? What is the unit used for Atomic mass? What is 1/12 of the mass of carbon -12 used to define? 13 answers QUESTION How many valance electrons do halogens have? 15 answers QUESTION Nonmetallic element properties vary more than metallic element properties do 2 answers Which of the following defines a metal?The definition of metal: A substance with high electrical conductivity, luster, and malleability, which readily loses electrons to form positive ions (cations).
Which of the following is a nonmetal quizlet?The nonmetals are hydrogen,oxygen (O), sulfur (S), selenium (Se), nitrogen (N), phosphorus (P), carbon (C), and group 17 and 18.
What is the only metal that normally exists on Earth as a liquid?Mercury is the only liquid metal found at normal temperatures.
What metal is glossy and ductile?Copper wire
Metals have a characteristic shiny appearance and are often used to make jewellery. This means that they can be bent into shape without breaking (malleable) and can be stretched into thin wires (ductile) such as copper.
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Which of the following is a metal Quizlet
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