Across
- 4. in the periodic table is a row of chemical elements.
- 9. close gathering of people or things.
- 11. smaller than or occurring within an atom.
- 12. the capacity for doing work.
- 14. the sum of the numbers of protons and neutrons present in the nucleus of an atom.
- 15. any substance that has mass and takes up space by having volume.
- 16. smallest unit into which matter can be divided without the release of electrically charged particles.
- 18. a minute portion of matter.
- 19. 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.
- 20. a metal made by combining two or more metallic elements, especially to give greater strength or resistance to corrosion.
- 21. process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the membrane.
- 24. any of the divalent strongly basic metals of group II of the periodic table comprising beryllium, magnesium, calcium, strontium, barium, and radium.
- 26. a material that consists of a single type of atom.
- 28. the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus.
- 29. the intermingling of substances by the natural movement of their particles.
Down
- 1. a number of people or things that are located close together or are considered or classed together.
- 2. a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson.
- 3. 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.
- 5. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- 6. theory the body of theory which explains the physical properties of matter in terms of the motions of its constituent particles.
- 7. the number of protons found in the nucleus of an atom of that element, and therefore identical to the charge number of the nucleus.
- 8. a molecule made of atoms from different elements.
- 10. a substance having a finite activation energy (band gap) for electron conduction.
- 11. a mark or character used as a conventional representation of an object, function, or process.
- 13. a chemical element that forms a salt when it reacts with metal
- 17. any of the elements lithium, sodium, potassium, rubidium, cesium, and francium, occupying Group IA (1) of the periodic table.
- 22. The smallest particle of a substance that has all of the physical and chemical properties of that substance.
- 23. an element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
- 25. any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light.
- 27. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.