Question

1. what is arsenic, classified as? (metal, non metal or metalloid?)

1. how are tungsten (w), copper (cu), and iron (fe) classified?

a. halogens \t\t\tb. noble gases \t\t\tc. transition metals

1. click on → on the periodic table. do the lanthanoid and actinoid families have specific group numbers?

a. yes \t\t\t\tb. no

Explanation:

Question 12

Arsenic (As) is located in the p - block of the periodic table, along the "staircase" that separates metals and non - metals. Elements with properties intermediate between metals and non - metals are called metalloids. Arsenic shows properties like brittleness (like non - metals) and can conduct electricity to some extent (like metals), so it is classified as a metalloid.

• Halogens are elements in Group 17 (e.g., F, Cl, Br), and Tungsten (W), Copper (Cu), and Iron (Fe) are not in Group 17.
• Noble gases are in Group 18 (e.g., He, Ne, Ar), and these three elements are not in Group 18.
• Transition metals are the elements in the d - block of the periodic table (Groups 3 - 12). Tungsten (W), Copper (Cu), and Iron (Fe) are all in the d - block, so they are transition metals. So the correct option is c.

The Lanthanoid (also called lanthanides) and Actinoid (also called actinides) families are the two rows of elements placed below the main body of the periodic table. They are part of the f - block elements. The main groups of the periodic table (Groups 1 - 2 and 13 - 18) have specific group numbers, but the Lanthanoid and Actinoid families do not have specific group numbers assigned in the same way as the main groups. So the answer is b.

Answer:

metalloid

Question 13