Concepts
What are metalloids?
Elements that have metal and non metal properties
What is the chemical symbol for silicon?
(Si)
Can metalloids conduct electricity?
yes, but only partially
In which industry is silicon most used
technologic
Which metalloid is toxic and was once used as poison?
Arsenic
How many metalloids are in the periodic table?
Seven
Name one metalloid use in electronics, like chips and computers?
Silicon (Si)
Do metalloids form acid basic or amphoteric oxides??
Usually amphoteric oxides
Which metalloid is used in some smoke detector
antimony
What kind of compounds do metalloids usually form?
mostly covalent compounds
Where are metalloid on the periodic table?
Along the zig zag line between metals and non metals
Which metalloids is used in matches and firework?
Antimony (Sb)
What happens when metalloid reacts with metals?
They can form compounds with ionic characteristics
Which metalloid is used to make heat resistant glass
Boron
which metalloid has atomic number 14?
silicon
What is another name for metalloids?
Semimetals
Which of the following is a metalloid? (A) Sodium (B) Boron (C) Sulfur
(B) Boron
Why are metalloids important in electronics?
they act as semiconductors than can be controlled
Which metalloid is found in insecticides and pesticides
arsenic
which metalloid can act as a conductor or insulator depending on temperature?
germanium
Mention 2 physical properties of metalloids?
Shiny, intermediate electrical conductivity, lustrous, solid at room temperature and brittle
Name three metalloids
Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium.
Which metalloid is commonly used in solar panel
Silicon
Which metalloid is used in aloids to harden lead
antimony
Why do metalloids often form covalent bonds?
Because they have intermediate electronegativity, similar to non-metals