Which of the following are the example of metalloids?

Which of the following is not an Isotope of Hydrogen?

Arrange the following elements from lowest conductivity to highest conductivity:

A) Metals

B) Non-Metals

C) Metalloids

Select the appropriate statements from the following:

A) Polonium is a chemical element with the symbol Po and atomic number $78$. It is used in thermoelectric power in space satellites.

B) Metalloids are the elements having properties that are intermediate between those of metals and nonmetals. 

C) Metalloids have intermediate heat and electrical conductivity between metals and nonmetals.

Which isotopes of hydrogen has no neutrons?

1. Protium

2. Deuterium

3. Tritium

Which of the statements given above is/are correct?

Select the appropriate statements from the following:

A) Silicon is a chemical element with the symbol Si and atomic number $14$. It is metalloid and used in semiconductors.

B) Non-Metals, Metalloids, Metals, these are arranged from lowest conductivity to highest conductivity.

C) Boron is a chemical element with the symbol B and atomic number $6$.

The mass number of an isotope of an element is $298$. If its nucleus has $196$neutrons, what is its atomic number?