Across
- 2. Atoms combining to form chemical compounds and bring stability to the resulting product.
- 5. The mutual sharing of one or more pairs of electrons between two atoms.
- 6. The bond formed by the complete transfer of valence electron to attain stability.
- 8. A gaseous, liquid or solid mixture that has the same proportions of its components throughout a given sample.
- 10. Molecules that do not have any electrical charges or partial charges.
- 13. The tendency of an atom to attract electrons in a molecule.
- 17. The number of particles in 1 mole (or mol) of a substance.
- 19. Regions surrounding the atomic nucleus containing a specific number of electrons.
- 21. The smallest part of a substance that cannot be broken down chemically.
- 22. A chemical substance that cannot be broken down into other substances by chemical reactions.
- 24. A type of heterogeneous mixture where solid particles do not dissolve in a liquid solution.
- 25. The total number of protons and neutrons in an atom.
- 26. The energy that is possessed by an object due to its motion or due to its position.
- 28. Atoms with the same number of protons but different numbers of neutrons.
- 29. Subatomic particle with a neutral charge.
- 31. A mixture in which very small particles of one substance are distributed evenly throughout another substance.
- 32. A unit of measurement that is the amount of a pure substance containing the same number of chemical units.
- 34. A state of matter in which the particles are far apart, fast-moving and not organised in any particular way.
- 35. A state of matter with particles closely packed.
- 39. Subatomic particles with a positive electrical charge.
- 40. The total weight of an atom.
- 41. An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable.
- 43. Any substance, usually liquid, which is capable of dissolving one or several substances, thus creating a solution.
- 44. The sum of the weights of the individual atoms that make up the molecule.
- 46. Electrically positive protons and electrically neutral neutrons held together by the strongest known fundamental force.
- 47. A set of quantum states of the negatively charged electrons trapped in the electrical field generated by the positively charged nucleus.
- 49. The ability to do work.
- 50. A substance made from two or more different elements that have been chemically joined.
- 51. particles Subatomic particle that is emitted from the nucleus of an atom during radioactive decay.
Down
- 1. The outermost shell of any atom.
- 3. Polar molecules are molecules that have a dipole or an uneven distribution of charge across their geometry resulting in one side being positive and the other side negative.
- 4. The starting materials in a reaction that undergo a chemical change to form a product.
- 7. A unit of concentration expressed as the number of moles of dissolved solute per liter of solution.
- 9. Energy that travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays.
- 11. The number of protons in a nucleus.
- 12. The smallest particle of a substance that has all of the physical and chemical properties of that substance.
- 14. rays A form of electromagnetic radiation similar to X-rays emitted from an excited nucleus.
- 15. A mixture is a combination of two or more pure substances in which each pure substance retains its individual chemical properties.
- 16. A homogeneous mixture of one or more solutes dissolved in a solvent.
- 18. Composite particles consisting of two protons and two neutrons tightly bound together.
- 20. A substance that is being dissolved.
- 23. Subatomic particle with a negative charge.
- 27. Energy stored in the bonds of chemical compounds.
- 30. The tendency of an atom to donate electrons and form positively charged cations.
- 33. The movement of electrically charged particles.
- 36. A state of matter which takes the shape of its container.
- 37. states that atoms are most stable when their outermost shell is filled with 8 electrons.
- 38. Negatively charged ions.
- 42. Positively charged ions.
- 45. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- 48. Anything that has mass and takes up space