19. Number of protons and neutrons needed for an electrically neutral atom:
- a. Carbon: 6 protons, 6 electrons
- b. Aluminum: 13 protons, 13 electrons
- c. Lead: 82 protons, 82 electrons
- d. Chlorine: 17 protons, 17 electrons
20. Are the following atoms electrically neutral?
- a. Sulfur: no
- b. Iron: no
- c. Silver: yes
- d. Iodine: no
21. Are the following atoms electrically neutral, an anion, or a cation?
- a. anion
- b. electrically neutral
- c. electrically neutral
- d. cation
- e. cation
22. Was the electrical charge or lack of electrical charge for each particle in #21 from a neutral atom gaining electrons, losing electrons, or neither?
- a. losing electrons
- b. neither
- c. neither
- d. gaining electrons
- e. gaining electrons
23. Symbol and electrical charge for the following atoms or ions:
- a. H
- b. Na+
- c. Cl-
- d. Al+
24. Name and formula for the ionic compound that can be formed from these cations and anions:
- a. KI = potassium iodine
- b. CaS = calcium sulfur
- c. FeBr = iron bromine
- d. BaOH = barium oxygen hydrogen
- e. NHPO = nitrogen hydrogen phosphorous oxygen
- f. AlO = aluminum oxygen
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