Answer:
Metalloids elements whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
Some examples:
Chemical element.
Boron.
Semiconductor.
Arsenic.
Silicon.
Selenium.
Antimony.
Germanium.
Density = Mass/Volume => Mass = Density*Volume => Mass = 3g/ml*10ml =30g
No it’s a very easy assignment
The percentage composition of a given compound is defined as the ratio of the amount of each element to the total amount of individual elements present in the compound multiplied by 100

= 34.79 %