Chemistry
What is Group 14 also called?
→ The Carbon Group.
Which element is the first in Group 14?
→ Carbon
What is the chemical symbol of carbon?
C
What is the chemical symbol of silicon?
Si
How many main elements are there in Group 14?
Five
Which element in Group 14 is a non-metal?
Carbon
Which elements of Group 14 are metalloids?
Silicon and germanium.
What is the chemical symbol of tin?
Sn
What is the chemical symbol of lead?
Pb
How many valence electrons do Group 14 elements have?
Four
Why is carbon considered the basis of organic chemistry?
Because it can form four covalent bonds and long chains.
Why is silicon widely used in technology?
Because it is a good semiconductor.
What type of element is germanium?
A metalloid
Name one common property of tin and lead?
Both are metals.
How does metallic character change down Group 14?
It increases.
Name the allotropes of carbon?
Diamond, graphite, and fullerenes.
What do silicon and germanium have in common?
Both are metalloids and semiconductors.
Why is lead considered a toxic metal?
Because it can harm the human body and nervous system.
What are the common oxidation states of Group 14 elements?
+4 and +2.
Which Group 14 elements are used as semiconductors?
Silicon and germanium.
Why can carbon form four covalent bonds?
Because it has four valence electrons.
What changes down Group 14: non-metal to metal or metal to non-metal?
→ Non-metal to metal
Why is silicon not found free in nature?
Because it is very reactive and forms compounds easily.
Lead is dangerous or safe for people?
Dangerous
Is lead harmful to humans?
Yes, it is harmful.