Question

1. this family is all radioactive. (0.5 points) *

halogens
oxygen group
actinides
alkali metals
noble gases
lanthanides
nitrogen group
transition metals
carbon group
alkaline earth metals
boron group

Explanation:

Actinides are a series of elements in the periodic table. All actinides are radioactive. Halogens (e.g., fluorine, chlorine) are not all radioactive. The oxygen group (e.g., oxygen, sulfur) are not all radioactive. Alkali metals (e.g., sodium, potassium) are not all radioactive. Noble gases (e.g., helium, neon) are not radioactive. Lanthanides have some radioactive elements but not all. Nitrogen group (e.g., nitrogen, phosphorus) are not all radioactive. Transition metals (e.g., iron, copper) are not all radioactive. Carbon group (e.g., carbon, silicon) are not all radioactive. Alkaline earth metals (e.g., magnesium, calcium) are not all radioactive. Boron group (e.g., boron, aluminum) are not all radioactive.

Answer:

Actinides