Science

2. a neutral particle made of two or more atoms joined in a chemical bond
4. the average mass of all the isotopes of an element; this is the decimal value found on an element card
6. a small particle in the nucleus of the atom; it has no electrical charge
9. An element is a pure substance that is made from a single type of atom. Elements are the building blocks for all the rest of the matter in the world
10. "a class of elements characterized by physical properties that include shininess
11. an element that lacks most of the properties of a metal; these are found on the right-hand side of the zigzag line on the periodic table
12. a horizontal row of elements in the periodic table
16. the number of protons in the nucleus of an atom; this number identifies an element and its location on the periodic table
17. the central core of the atom made up of protons and neutrons
19. a positively charged particle that is part of an atom's nucleus; the number of protons is known as the atomic number
20. the places surrounding the nucleus of an atom where the electrons are most likely to be at any given time

1. a well-blended mixture, containing a solvent and at least one solute, which has the same properties throughout
3. two or more substances that are mixed together but are not chemically combined; the recipe is changeable
5. an element that has some characteristics of both metals and nonmetals; these are found hugging the zigzag line on the periodic table
7. a pure substance made of two or more different elements chemically combined in a set ratio (the recipe is always the same)
8. the basic particle from which all elements are made
13. a negatively charged particle found outside the nucleus of an atom
14. a one- or two-letter representation of an element on the periodic table
15. elements in the same vertical column of the periodic table; also known as a 'family'
18. a chart of the elements showing the repeating pattern of their properties; arranged by atomic numbers of the elements