Across
- 3. New lands : invented octaves
- 7. Anything that occupied space
- 10. Neutralize acid to form a salt-turns blue litmus paper
- 14. : the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.
- 15. numerical measure of hot or cold.
- 16. tube holder: The main function is to hold test tubes during various experiments. Some experiments entail heating chemicals and you cannot hold the test tube with your bare hands.
- 17. formulated an atomic theory
- 18. :s a term in physical chemistry and material science refers to substances and mixtures which are in a single phase
- 19. negatively charge particle ,J.J Thomson
- 22. Mendeleev :The father of modern periodic able
- 23. :Study of matter
- 25. effect t:formulated by John Tyndall ,Scattering of light through a colloidal system.
- 26. Döbereiner : he invented the triads (according to there similar physical & chemical activity)
Down
- 1. Crookes: cathode ray tubes
- 2. a unit of measurement used in chemistry to express amounts of a chemical substance, defined as the amount of any substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12 (12C), the isotope of carbon with relative atomic mass 12. This corresponds to the Avogadro constant, which has a value of 6.02214129(27)×1023 elementary entities of the substance.
- 4. Method :A way of investigating & solving problems by step procedure
- 5. law :A law in chemistry , the elements when arrange in the order of their atomic numbers show a periodic variation of atomic structure& most of their properties.
- 6. : the number of moles of solute dissolved in one liter of solution. The units, therefore are moles per liter, specifically it's moles of solute per liter of solution.
- 8. zero charge particle, James Chadwick
- 9. they have definite number of atoms & they are chemically combined.
- 11. basic unit
- 12. that result from the neutralization reaction of an acid and a base
- 13. :a mixture is made of different substances that remain physically separate.
- 20. :positively charge particle, Eugene Gold stein
- 21. two element form a single compound
- 23. :a type of homogeneous mixture in which the dispersed particle do not settle out & a dispersing medium
- 24. Thomson: used cathode rays to prove that electrons exists
- 27. Name :Trivial Name
- 28. a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts. Aqueous solutions of acids have a pH of less than 7.
- 29. Bohr :made the planetary model of the atom,use atomic spectra