Question One •Compare the size of a atom with the size of a flea? Question 2 • Why are there two elements in H2O? Question 3 •If there are 12 protons in an atom, then what atom is it? Question 4 •Why is the Periodic Table arranged by the Atomic Number? Question 5 This model is a model of what atom? Question 6 •Why is the charge of the nucleus positive? Question 7 •Why is the atomic number of Hydrogen one? 8 Explain the different ways the Periodic Table is arranged. • Atomic Number • Metals, Metalloids, and Nonmetals • Valence Electrons (Groups or Families) Question 9 Which of these best describes one of the subatomic particles that could be found at location X in the model of an atom shown above? A. It has mass but no charge. B. It has no mass and a positive charge. C. It has a large mass and a negative charge. D. It has no mass and an equal number of positive and negative charges. Question 10 •How many atoms are in CO ? 2