Question

groups of the periodic table

• elements on the periodic table are categorized into
• elements in the same group have similar properties.

instructions: in the periodic table below, label each identified group.
instructions: identify the group that each element belongs to.

1. calcium (ca)
2. neon (ne)
3. bromine (br)
4. copper (cu)
5. lithium (li)
6. silver (ag)
7. xenon (xe)
8. thorium (th)

Explanation:

Elements in the periodic table are grouped based on their electron - shell configurations and similar chemical and physical properties. We identify the group of each element by its position in the periodic table.
Calcium (Ca) is in Group 2 as it has 2 valence electrons. Neon (Ne) is a noble gas in Group 18 with a full outer electron shell. Bromine (Br) is a halogen in Group 17 as it has 7 valence electrons. Copper (Cu) is in Group 11. Lithium (Li) is in Group 1 as it has 1 valence electron. Silver (Ag) is in Group 11. Xenon (Xe) is a noble gas in Group 18. Thorium (Th) is an actinide and is usually considered in the group of inner - transition metals, but in the main periodic table structure, it can be related to Group 3 in the extended sense.

Answer:

1. Calcium (Ca): Group 2
2. Neon (Ne): Group 18
3. Bromine (Br): Group 17
4. Copper (Cu): Group 11
5. Lithium (Li): Group 1
6. Silver (Ag): Group 11
7. Xenon (Xe): Group 18
8. Thorium (Th): Group 3 (in extended sense for actinides related to periodic table structure)