Unit 2 science vocabs

1. Elements in the same group that have similar physical and chemical properties.
7. A substance made up of two or more different elements
9. Regulates chemical activities of the body and build and repair structures
10. An element that is shiny and conducts heat and electricity well.
13. A particle having no electric charge
14. variants of a particular chemical element which differ in neutron number.
17. Dalton’s theory stated all elements of a particlular element are identical, but are different from atoms of all other elements.
20. Electron that are found in the outermost portion of the electron cloud of an atom.
21. A Positively-charged particles within an atom
22. A substance that has definite physical and chemical properties
23. A mixture that does not have a uniform composition
24. Are mixtures in which the particles are spread throughout a liquid or gas but are too large to stay mixed without being stirred or shaken
26. symbols Abbreviation for the element’s name.
28. cloud Where the electro/lns are around the nucleus
30. table Mendeleev’s arrangmet of the elements.
31. Refers to compounds that don't contain carbon and hydrogen
33. Is called a group on the periodic table
34. Contains genetic information and help the body build protein
38. An element that as some property of metals and some properties of nonmetals.

2. A combination of two or more substances that are not chemically combined
3. A substance that cannot be separated or broken down
4. Refers to compounds that contain carbon and hydrogen
5. Mass The total number of neutrons and protons.
6. Vertical columns on the periodic table.
7. Used as a source of energy and include sugars
8. A mixture that has its substances separated evenly
11. Biochemicals that store excess energy in the body
12. An element which is a poor conductor of heat and electricity.
15. The smallest particle into which an element can be divided
16. The negatively-charged particles in the atom
18. The weighted average of the masses of all the naturally occurring isotopes of that element.
19. A horizontal trend on the periodic table and is called a period
25. The measure acidity of a compound
27. A group of atoms bonded together
29. an atom or molecule that has a non-zero net electrical charge.
32. A combination of neutrons and protons located in the center of the atom
35. Are mixtures in which one substance is dissolved in another substance
36. Are mixtures here the particles are spread throughout a gas or liquid
37. Horizental rows of elements on the periodic table