Across
- 3. electrons in the outermost shell, or energy level, of an atom.
- 5. a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns (between groups 3 and 4) are not numbered.
- 9. a compound that consists of only two elements
- 10. the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
- 11. a positively charged ion.
- 12. table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties.
- 14. a chemical bond formed when atoms share electrons
- 17. a physically distinctive form of matter, such as a solid, liquid, gas, or plasma
- 19. the total number of protons and neutrons in a nucleus.
- 20. one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties.
- 23. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- 25. The joining together of atoms that results from forces of attraction
- 26. an element that readily forms positive ions and has metallic bonds
- 27. a column of elements in the periodic table of the chemical elements
- 29. an atom that has lost electrons, resulting in an overall positive charge.
- 31. a group of atoms that are joined together with covalent bonds
- 35. the elements in groups 14-16 of the periodic table, not able to conduct electricity or heat very well, very brittle, and cannot be rolled into wires or pounded into sheets.
Down
- 1. a compound that consists of only two elements: a metal and a nonmetal it forms when electrons are transferred from one atom to the other, causing the atoms to develop opposite charges.
- 2. The organization of electrons in energy levels
- 4. the group of elements whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table
- 6. a shorthand notation used to identify a compound
- 7. a negatively charged ion.
- 8. specific patterns in the properties of chemical elements that are revealed in the periodic table of elements
- 13. the basic units of matter and the defining structure of elements.
- 15. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 16. the system of electrons surrounding the nucleus of an atom.
- 18. in a chemical formula is a small number placed below the Baseline that tells how many atoms of an element are in each molecule or compound
- 21. a pure substance composed of two or more elements that are chemically combined in a fixed portion
- 22. a row of chemical elements
- 24. an atom that has gained electrons, thereby taking on a negative charge.
- 28. a chemical bond formed when atoms gain or lose electrons
- 30. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- 31. an imprecise term used to describe a chemical element that forms a simple substance having properties intermediate between those of a typical metal and a typical nonmetal.
- 32. the mass of an atom of a chemical element expressed in atomic mass units. It i approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
- 33. a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- 34. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.