Facts about Elements

1. Is made up of the elements sodium and chlorine
3. All known elements are arranged on a table called?
6. Number of proton and neutrons in the nucleus of an atom
7. Numbers in chemical formula that relative amounts of the element in a compound
11. Chemists use one or ? letters to represent an element
12. There are 90 elements on the periodic table that occur in ? and the others are stickily man-made
14. Who discovered that an atom is mostly empty space
16. Neutral particles have no ? charge
18. Chemical is a ? way of writing the name of an element
19. Vertical column of elements in the periodic table

1. Know of 117 different elements
2. Most elements of the periodic table are ?
4. Use symbols to represent elements
5. The element ? is made up of atoms containing a single proton and a single electron
8. Elements are substances that cannot be......into simpler substances
9. Features that describe objects
10. The rows of the periodic table are called ?
13. delton What was the name of the first person to suggest the idea of an atom
15. An element is a substance that is made entirely from one type of ....
17. Substance made up of two or more elements that are chemically combined