*Match the information to the color and name of the group on the periodic table.
One valence electron, good electrical conductor, high reactivity
Form +2 cations, form salts with nonmetals, ductile
highly reactive nonmetals, brittle when solid, form -1 anions when they gain one electron
Most stable group, full outer shell of 8 valence electrons; least likely to form bonds
Answers:
1.alkali metals-red
2.alkaline earth metals-orange
3.halogens-blue
4.noble gases-purple/magenta
Question: A shiny, brittle solid material is tested for electrical conductivity. It does conduct electricity, but only a little bit.
This unknown material is most likey a
Answer: metalloid
Metalloids are semiconductors that are shiny, solid at room temperature, and brittle.
Question: Match the definition to the word it best represents.
An atom that has a different number of neutron and the same number of protons -isotope
An atom that has gained or lost electrons - ion
An atom that has equal numbers of electrons and protons - neutral
the number of protons in an atom - atomic number