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Matter CW 2
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Atom: smallest piece of an element that still represents the element
Electron: atomic particle with one negative charge (1–)
Electron: cloud area around an atomic nucleus where an electron is most likely to be found
Neutron: neutral particle in the nucleus of an atom
Nucleus: small area in the center of an atom in which most of an atom’s mass and positive charge is concentrated
Proton: atomic particle with one positive charge (1+)
Atomicnumber: the number of protons in an atom of an element
averageatomicmass: average mass of an element’s isotopes, weighted according to the abundance of each isotope
ion: atom that is no longer neutral because it has gained or lost electrons
isotope: any of two or more atoms of the same element that have different numbers of neutrons
massnumber: sum of the number of protons and neutrons in an atom
nucleardecay: process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation
radioactive: describes elements that spontaneously emit radiation
spontaneous: occurring without external force or cause
group: column on the periodic table
period: row on the periodic table
periodictable: chart of the elements arranged in rows and columns according to the elements’ physical and chemical properties
alkalimetal: element in group 1 on the periodic table
alkalineearth: metal element in group 2 on the periodic table
density: mass per unit volume of a substance
ductility: ability of a substance to be pulled into thin wires
luster: ability of a metal to reflect light
malleability: ability of a substance to be hammered or rolled into sheets
metal: generally shiny element; easily pulled into wires or hammered into thin sheets; a good conductor of electricity and thermal energy
transition: element element in groups 3–12 on the periodic table
construct: to make by combining and arranging parts
halogen: element in group 17 on the periodic table
metalloid: element with physical and chemical properties of metals and nonmetals
noblegas: element in group 18 on the periodic table
nonmetal: element that has no metallic properties
semiconductor: material that conducts electricity at high temperatures but not at low temperatures
Matter CW 2
Across:1. | the number of protons in an atom of an element | 5. | smallest piece of an element that still represents the element | 8. | atom that is no longer neutral because it has gained or lost electrons | 12. | column on the periodic table | 13. | element element in groups 3–12 on the periodic table | 16. | process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation | 17. | ability of a metal to reflect light | 18. | element in group 18 on the periodic table |
| 20. | any of two or more atoms of the same element that have different numbers of neutrons | 21. | generally shiny element; easily pulled into wires or hammered into thin sheets; a good conductor of electricity and thermal energy | 22. | neutral particle in the nucleus of an atom | 24. | atomic particle with one positive charge (1+) | 25. | cloud area around an atomic nucleus where an electron is most likely to be found | 26. | atomic particle with one negative charge (1–) | 27. | row on the periodic table |
| | Down:1. | metal element in group 2 on the periodic table | 2. | to make by combining and arranging parts | 3. | describes elements that spontaneously emit radiation | 4. | average mass of an element’s isotopes, weighted according to the abundance of each isotope | 6. | material that conducts electricity at high temperatures but not at low temperatures | 7. | element with physical and chemical properties of metals and nonmetals | 9. | element that has no metallic properties |
| 10. | element in group 1 on the periodic table | 11. | mass per unit volume of a substance | 14. | small area in the center of an atom in which most of an atom’s mass and positive charge is concentrated | 15. | ability of a substance to be hammered or rolled into sheets | 19. | chart of the elements arranged in rows and columns according to the elements’ physical and chemical properties | 21. | sum of the number of protons and neutrons in an atom | 23. | element in group 17 on the periodic table |
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PuzzleFast.com, Noncommercial Use Only
Matter CW 2
Across:1. | the number of protons in an atom of an element | 5. | smallest piece of an element that still represents the element | 8. | atom that is no longer neutral because it has gained or lost electrons | 12. | column on the periodic table | 13. | element element in groups 3–12 on the periodic table | 16. | process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation | 17. | ability of a metal to reflect light | 18. | element in group 18 on the periodic table |
| 20. | any of two or more atoms of the same element that have different numbers of neutrons | 21. | generally shiny element; easily pulled into wires or hammered into thin sheets; a good conductor of electricity and thermal energy | 22. | neutral particle in the nucleus of an atom | 24. | atomic particle with one positive charge (1+) | 25. | cloud area around an atomic nucleus where an electron is most likely to be found | 26. | atomic particle with one negative charge (1–) | 27. | row on the periodic table |
| | Down:1. | metal element in group 2 on the periodic table | 2. | to make by combining and arranging parts | 3. | describes elements that spontaneously emit radiation | 4. | average mass of an element’s isotopes, weighted according to the abundance of each isotope | 6. | material that conducts electricity at high temperatures but not at low temperatures | 7. | element with physical and chemical properties of metals and nonmetals | 9. | element that has no metallic properties |
| 10. | element in group 1 on the periodic table | 11. | mass per unit volume of a substance | 14. | small area in the center of an atom in which most of an atom’s mass and positive charge is concentrated | 15. | ability of a substance to be hammered or rolled into sheets | 19. | chart of the elements arranged in rows and columns according to the elements’ physical and chemical properties | 21. | sum of the number of protons and neutrons in an atom | 23. | element in group 17 on the periodic table |
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© 2016
PuzzleFast.com, Noncommercial Use Only