Question

identify each element as a metal, metalloid, or nonmetal. 1. silicon (si) 2. gold (au) 3. sulfur (s) 4. barium (ba) 5. carbon (c) 6. sodium (na)

Explanation:

1. Selenium (Se) is a non - metal as it has properties typical of non - metals such as poor electrical conductivity and a tendency to gain electrons in chemical reactions.
2. Gold (Au) is a metal. It is a good conductor of heat and electricity, malleable, and ductile.
3. Sulfur (S) is a non - metal. It is brittle, a poor conductor, and forms acidic oxides.
4. Barium (Ba) is a metal. It is a reactive metal that readily loses electrons in chemical reactions.
5. Carbon (C) is a non - metal. It has various allotropes and is a key element in organic compounds, and is a poor conductor in most forms.
6. Sodium (Na) is a metal. It is a highly reactive metal that is soft and has a low melting point.

Answer:

1. Nonmetal
2. Metal
3. Nonmetal
4. Metal
5. Nonmetal
6. Metal