- The element "Pf" is in Group 1, Period 1. It corresponds to Hydrogen (H) on Earth.
- The element "Bo" is in Group 18, Period 1. It corresponds to Helium (He) on Earth.
- The element "Ch" is in Group 2, Period 2. It corresponds to Beryllium (Be) on Earth.
- The element "D" is in Group 2, Period 2. It corresponds to Magnesium (Mg) on Earth.
- The element "E" is in Group 13, Period 2. It corresponds to Boron (B) on Earth.
- The element "Fx" is in Group 14, Period 2. It corresponds to Carbon (C) on Earth.
- The element "G" is in Group 15, Period 2. It corresponds to Nitrogen (N) on Earth.
- The element "Nu" is in Group 16, Period 2. It corresponds to Oxygen (O) on Earth.
- The element "A" is in Group 17, Period 2. It corresponds to Fluorine (F) on Earth.
- The element "L" is in Group 18, Period 2. It corresponds to Neon (Ne) on Earth.
- The element "By" is in Group 2, Period 3. It corresponds to Calcium (Ca) on Earth.
- The element "Z" is in Group 2, Period 3. It corresponds to Strontium (Sr) on Earth.
- The element "Yz" is in Group 13, Period 3. It corresponds to Aluminum (Al) on Earth.
- The element "Hi" is in Group 14, Period 3. It corresponds to Silicon (Si) on Earth.
- The element "M" is in Group 15, Period 3. It corresponds to Phosphorus (P) on Earth.
- The element "Oz" is in Group 16, Period 3. It corresponds to Sulfur (S) on Earth.
- The element "Kt" is in Group 17, Period 3. It corresponds to Chlorine (Cl) on Earth.
- The element "J" is in Group 18, Period 3. It corresponds to Argon (Ar) on Earth.
- The element "Q" is in Group 2, Period 4. It corresponds to Barium (Ba) on Earth.
- The element "Do" is in Group 2, Period 4. It corresponds to Radium (Ra) on Earth.
- The element "R" is in Group 13, Period 4. It corresponds to Gallium (Ga) on Earth.
- The element "T" is in Group 14, Period 4. It corresponds to Germanium (Ge) on Earth.
- The element "Ss" is in Group 15, Period 4. It corresponds to Arsenic (As) on Earth.
- The element "Up" is in Group 16, Period 4. It corresponds to Selenium (Se) on Earth.
- The element "V" is in Group 17, Period 4. It corresponds to Bromine (Br) on Earth.
- The element "Wo" is in Group 18, Period 4. It corresponds to Krypton (Kr) on Earth.
- The element "X" is in Group 2, Period 5. It corresponds to an element below Radium, which would be in the 7th period on Earth, but since this is Period 5, it likely represents a placeholder for a heavier alkaline earth metal not commonly listed, such as Radium's next homologue (which doesn't exist stably on Earth).
- The element "Pi" is in Group 2, Period 5. It corresponds to another heavy alkaline earth metal, potentially beyond Radium, which is not stable on Earth.
- The element "An" is in Group 13, Period 5. It corresponds to Indium (In) on Earth.
- The element "El" is in Group 14, Period 5. It corresponds to Tin (Sn) on Earth.
Parent Tip: Review the logic above to help your child master the concept of alien periodic table worksheet answer key.
