Printable chemistry worksheet focusing on periodic trends, including questions about electron affinity, electronegativity, ionization energy, atomic radius, and element properties.

1a. Bi
1b. As
1c. O
1d. Po
1e. F
1f. Cs
2. metal
3. The distance from the nucleus to the outermost electron shell.
4. Atomic size decreases across a period and increases down a group.
5. Francium (Fr)
6. Metals tend to lose electrons to form cations, are good conductors of heat and electricity, and are malleable and ductile; nonmetals tend to gain electrons to form anions, are poor conductors, and are brittle in solid form.
7a. similar
7b. similar
7c. different
7d. similar
7e. similar
7f. different
8. Fluorine (F)
9. Alkali metals
10. Noble gases