Question

the number of valence electrons an element has determines not only what kind of ions it forms but its chemical behavior also. therefore, chemicals in the same family tend to behave similarly. however, as you go down a metal group, the elements are more reactive because they get rid of electrons more easily. the opposite is true for the nonmetals. nonmetals are more reactive at the top of a group because the elements higher in the group have a greater affinity for electrons.

1. which elements behave like...

a. ca?
b. li?
c. o?
d. cl?

Explanation:

To solve this, we analyze the group behavior of each element:

Part a: Ca (Calcium)

Calcium is in Group 2 (alkaline earth metals). Elements in the same group have similar chemical properties. So, Ca behaves like other Group 2 metals (e.g., Mg, Be).

Part b: Li (Lithium)

Lithium is in Group 1 (alkali metals). It behaves like other Group 1 metals (e.g., Na, K).

Part c: O (Oxygen)

Oxygen is in Group 16 (chalcogens). It behaves like other Group 16 non - metals (e.g., S, Se).

Part d: Cl (Chlorine)

Chlorine is in Group 17 (halogens). It behaves like other Group 17 non - metals (e.g., F, Br).

Final Answers

a. Elements in Group 2 (e.g., Mg, Be)
b. Elements in Group 1 (e.g., Na, K)
c. Elements in Group 16 (e.g., S, Se)
d. Elements in Group 17 (e.g., F, Br)

Answer:

To solve this, we analyze the group behavior of each element:

Part a: Ca (Calcium)

Calcium is in Group 2 (alkaline earth metals). Elements in the same group have similar chemical properties. So, Ca behaves like other Group 2 metals (e.g., Mg, Be).

Part b: Li (Lithium)

Lithium is in Group 1 (alkali metals). It behaves like other Group 1 metals (e.g., Na, K).

Part c: O (Oxygen)

Oxygen is in Group 16 (chalcogens). It behaves like other Group 16 non - metals (e.g., S, Se).

Part d: Cl (Chlorine)

Chlorine is in Group 17 (halogens). It behaves like other Group 17 non - metals (e.g., F, Br).

Final Answers

a. Elements in Group 2 (e.g., Mg, Be)
b. Elements in Group 1 (e.g., Na, K)
c. Elements in Group 16 (e.g., S, Se)
d. Elements in Group 17 (e.g., F, Br)