Question

part b: atomic calculations

1. label the information provided in the periodic table.
2. what does the atomic number represent?

________ or ________

1. what does the atomic mass represent?

________ + ________

Explanation:

• For question 6: In the periodic table, the top number (e.g., 8) is the atomic number. The letter (e.g., O) is the chemical symbol. The name (e.g., Oxygen) is the element's name. The bottom number (e.g., 15.999) is the atomic mass.
• For question 7: The atomic number represents the number of protons in an atom. Since in a neutral atom, the number of protons equals the number of electrons, it can also represent the number of electrons in a neutral atom.
• For question 8: The atomic mass represents the sum of the number of protons and neutrons in an atom.

Answer:

6.

• 8: Atomic number
• O: Chemical symbol
• Oxygen: Element name
• 15.999: Atomic mass

1. Number of protons; number of electrons (in a neutral atom)
2. Number of protons; number of neutrons