Across
- 4. melting nd boiling points less than krypton
- 6. distance between the nucleus and the electron
- 7. any atom or group of atoms that bears one or more positive or negative electrical charges
Down
- 1. has a smaller atomic radius than calcium
- 2. melting and boiling points are more than magnesium
- 3. horizontal rows of the periodic table
- 5. column in the periodic table