Chemistry 1

1. The number of protons in the nucleus of an atom
3. An element with physical and chemical properties of both metals and nonmetals
6. The prefix meaning "4"
8. The gaining of electrons Hint: GER
9. The types of rooms found on the right side of the table
10. An ion with a negative charge
12. Where most of the mass of an atom is
17. He did the gold foil experiment
20. Elements that contain the same number of protons but different numbers of electrons
21. A substance with a low pH
22. Types of elements found on the left side of the periodic table
24. The smallest part of the atom

2. A compound that is made of two or more nonmetals
4. A compound that is made of a metal & a nonmetal
5. The arrangement of elements that organizes them by property and atomic number Hint: it is our main reference for elements
7. Color of a sodium flame
11. The temperature, in Celsius, at which water boils Hint: spell it out
13. What is emitted when an electron falls from one energy level to another
14. These should always be worn to protect our eyes in a lab
15. An ion with a positive charge
16. Type of room that consists of group 1 & 2
18. The loss of electrons Hint: LEO
19. Pure substance that cannot be broken down into smaller substances
23. Form of matter made with electrons, neutrons, and protons