Across
- 1. An element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of
- 5. Any of the six chemical elements that comprise Group 2 (IIa) of the periodic table
- 7. Any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table
- 9. Any of the six chemical elements that make up Group 1 (Ia) of the periodic table
- 11. The time interval between two successive repetitions.
- 13. to or shared with another atom
- 15. An atom or group of atoms in which the number of electron s is different from the number of
- 17. as by malleability, ductility, and high reflectivity of light.
- 20. A theory of matter and energy based on the concept of quanta, especially quantum mechanics.
- 21. and solid nonmetals or semiconductors.
- 23. of neutrons
- 24. A subatomic particle found in the nucleus of every atom.
- 25. A part or aspect of something abstract, especially one that is essential or characteristic
- 28. The sum of the numbers of protons and neutrons present in the nucleus of an atom
- 29. A thing that is composed of two or more separate elements; a mixture.
- 31. The small, dense region consisting of protons and neutrons at the center of an atom
- 33. A set of objects with an operation *
- 34. Subatomic particles found inside the nucleus of every atom
- 35. A substance made by mixing other substances together.
- 39. with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
- 42. Emitting or relating to the emission of ionizing radiation or particles.
- 43. A characteristic of a unit of matter that expresses the extent to which it has more or
Down
- 2. in order of increasing number of protons in the nucleus
- 3. A negatively charged particle, located in the outermost shell of an atom, that can be
- 4. The basic unit of a chemical element.
- 6. Not likely to give way or overturn; firmly fixed
- 8. the tendency, quality, or fact of recurring at regular intervals
- 10. Any of various chemical elements that have valence electrons
- 12. Any of a class of substances characterized by high electrical and thermal conductivity as
- 14. A stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the
- 16. A substance having a finite activation energy (band gap) for electron conduction
- 18. carrier of electricity in solids.
- 19. a fundamental constant that is the smallest known quantity of electricity and that
- 22. The number of a chemical element in the periodic system, whereby the elements are
- 26. a value (either positive or negative) of 1.602176634 ×10-19 coulombs.
- 27. atom, electron, or nucleus, can have.
- 30. Any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table.
- 32. Members of a family of an element that all have the same number of protons but different
- 36. electrons than protons.
- 37. A table of the chemical elements arranged in order of atomic number, usually in rows, so that
- 38. Atomic weight is measured in atomic mass units (amu), also called daltons.
- 40. A group of electrons circulating around a nucleus or a molecule
- 41. The fixed amount of energy that a system described by quantum mechanics, such as a molecule,