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Select the statements below that show an increase when looking at the periodic table.

Question 5 options:

Number of energy levels from top to bottom within the same group

Atomic number from top to bottom within the same group

Number of energy levels from left to right within the same period

Atomic number from left to right within the same period

1 answer

When examining the periodic table, the following statements show an increase:

  1. Number of energy levels from top to bottom within the same group - As you move down a group (column) in the periodic table, the number of energy levels (or electron shells) increases.

  2. Atomic number from top to bottom within the same group - The atomic number (number of protons) increases as you go down a group.

  3. Atomic number from left to right within the same period - As you move from left to right across a period (row) in the periodic table, the atomic number increases.

The only statement that does not show an increase is:

  • Number of energy levels from left to right within the same period - The number of energy levels remains the same across a period; what increases are the number of electrons and protons, but the energy levels stay constant.

In summary, the statements indicating an increase are:

  • Number of energy levels from top to bottom within the same group
  • Atomic number from top to bottom within the same group
  • Atomic number from left to right within the same period