Read the description of four elements listed below.
Element A is a hard crystalline solid. Its melting point is 1410oC.
The element is used extensively as an electrical semi conductor.
It is a conductor of heat
Element B is a dense purple solid which fumes in air. It melts at 113.5oC
While its vapours are poisonous and cause irritation to the eyes and throat,
it is a trace element essential to humans
Element C is soft and shiny. It dulls in air and has a melting point of 769oC.
The element is a conductor of heat and electricity and reacts with water.
Element D is a dense, yellow solid with a brilliant lustre. It is malleable and ductile
and an excellent conductor of both heat and electricity. It melts at 1064oC.
This element is usually found uncombined in nature.
a)From the description of the elements, classify them as metals, semi metals or non metals.1
Element A ……………Semi Metal……… Element B ………Non metal………………………
Element C ………………………Metal……… Element D ……………………Metal…………
IS THIS RIGHT???
Element A is a hard crystalline solid. Its melting point is 1410oC.
The element is used extensively as an electrical semi conductor.
It is a conductor of heat
Element B is a dense purple solid which fumes in air. It melts at 113.5oC
While its vapours are poisonous and cause irritation to the eyes and throat,
it is a trace element essential to humans
Element C is soft and shiny. It dulls in air and has a melting point of 769oC.
The element is a conductor of heat and electricity and reacts with water.
Element D is a dense, yellow solid with a brilliant lustre. It is malleable and ductile
and an excellent conductor of both heat and electricity. It melts at 1064oC.
This element is usually found uncombined in nature.
a)From the description of the elements, classify them as metals, semi metals or non metals.1
Element A ……………Semi Metal……… Element B ………Non metal………………………
Element C ………………………Metal……… Element D ……………………Metal…………
IS THIS RIGHT???