Question

multiple choice 1 point
elements in a group of the periodic table are described below.
-soft silvery - white color
-good conductor of thermal energy
-good conductor of electricity
-atoms contain a single valence electron
these elements most likely belong to which group?
halogens
alkali metals
alkaline earth metals
noble gases

Explanation:

• Alkali metals (Group 1) have one valence electron.
• They are soft, silvery - white metals.
• They are good conductors of heat (thermal energy) and electricity.
• Halogens (Group 17) are non - metals (except for astatine which has some metallic properties), and they have 7 valence electrons.
• Alkaline earth metals (Group 2) have 2 valence electrons.
• Noble gases (Group 18) have a full valence shell (2 for helium, 8 for others) and are generally inert.

Answer:

Alkali metals