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Atom Review

Atoms are the fundamental units of matter, each retaining the unique properties of an element. They consist of protons, which have a positive charge, and neutrons, which are neutral, located in the nucleus, while electrons, with a negative charge, orbit the nucleus in shells. The electron shell configuration is often summarized by the magic numbers: 2, 8, 18, and 32. The identity of an element is largely determined by the number of protons. This overview explores the characteristics and structure of atoms, including the role of subatomic particles.

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Atom Review

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  1. Atom Review

  2. The smallest part of an element that retains the properties of the element is the ?

  3. atom

  4. Protons have a ___Charge?

  5. positive

  6. Neutrons have a _ charge?

  7. Neutral/ no charge

  8. Electrons have a _ charge?

  9. negative

  10. What is found in the nucleus?

  11. Protons and neutrons

  12. Where are electrons found?

  13. In the shells surrounding the nucleus.

  14. What is the magic # for the electron shells? • Bonus points: +5: what are the other shell numbers?

  15. 2,8,8 for the 1st 18. • 2, 8, 18, 32,50, 72

  16. Which part of the atom has a negative charge?

  17. electrons

  18. The charge of the nucleus of an atom is due to the presence of

  19. Positive protons

  20. How many neutrons for the atom of Mercury?

  21. 121 • 201 • -80 121

  22. What subatomic particle is not found in the nucleus?

  23. The electrons

  24. When determining an elements identity, what is the MOST important subatomic part to examine?

  25. protons

  26. MOST of the volume of an atom is occupied by-

  27. Empty space

  28. How many protons would an atom of chlorine have?

  29. 17 same as the atomic #

  30. If you have many models of an atom, how do you determine which one has the lowest mass?

  31. By counting all of the protons and neutrons.

  32. Find the mass of this atom. • 23 P • 15 N

  33. 38 • 23+15= 38

  34. How do you find the valence electrons?

  35. Count the electrons on the outer most shell.

  36. Describe a neutron

  37. No charge • About same mass as a proton

  38. What is the charge of an atom’s nucleus if it has • 17 protons, 20 neutrons, and 17 electrons

  39. + 17 protons

  40. Neils Bohr is credited for his work with?

  41. Developing the model of an atom as a build up of successive orbital shells of electrons. • The model we use today.

  42. Draw the atom of Magnesium

  43. 12 • Mg • 24 • 12 P, 12 N, 12 E • 2 e, 8 e, 2 e in last shell

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