University:
Winston-Salem Forsyth County Schools
Course:
AP Chemistry
Academic year:

2013
Views:

387

Pages:

1
Author:

ei1doi8ov

Across 2. I am a member of the carbon family often mistaken for the end of your pencil. Lead 3. I am not really an alkali metal, but since I have only 1 electron I behave like them. Hydrogen 5. The subatomic particle in the nucleus with mass and a positive charge. Proton 7. Elements are organized in groups (columns) according to the number of _____ electrons. Valence 10. If I am a neutral (no charge) atom of this element, I would have 83 electrons. Bismuth 11. I have 20 neutrons and am found in your teeth and bones. Calcium 13. You would add up the protons and neutrons to get this number. Mass number 14. If I need to know how many valence electrons are in an atom of Fluorine, I just have to look at the _____ number. Group 16. I am a gas with 8 protons and 8 neutrons. Oxygen 17. The first shell/energy level of electrons can hold only _____ electrons. Two Down The subatomic particle in the nucleus with mass and a neutral charge. Neutron I am a noble gas with 2 electrons. Helium This is the model of the atom we draw when we want to show the location of an atom’s electrons in their energy levels. Bohr I am a silvery white metal used to make salt. Sodium The subatomic particles with almost no mass, but a negative charge. Electron This special number is the identity of the atom. It is the same for all atoms of a particular element. It also tells us the number of protons in an atom. Atomic number I have 26 protons. Iron Elements are organized into rows called _____ . They tell us how many energy levels (shells) an atom of the element has. Periods