Question

(i) Compare metals and non - metals based on their physical properties (any four points). (ii) What are metalloids? Give two example.

Answer 1

Hlw mate here is your answer ⬇️⬇️⬇️

The difference between metal and non-metal on the basis of their physical properties are :

(IN PHYSICAL STATE)
⚫METALS = THEY ARE ALL SOLID AT ROOM TEMPERATURE BUT EXCEPT MERCURY THAT IS LIQUID.

⚫NON-METAL=THEY ARE MAY EXIST IN THE ROOM TEMPERATURE IN THE FORM OF SOLID, LIQUID AND IN GASEOUS STATE.

(MELTING AND BOILING POINT)

⚫METAL=THEY GENERALLY HAVE A HIGH MELTING AS WELL AS HIGH BOILING POINT.

⚫NON-METAL = THEY GENERALLY HAVE LOW MELTING POINT AS WELL AS LOWERING BOILING POINT.

(DENSITY)

⚫METAL=THEY GENERALLY HAVE HIGH DENSITY BUT EXCEPT Sodium and potassium WHICH ARE METALS, BUT BOTH HAVE A DENSITY VALUE IS LESS THAN THAT OF WATER.

⚫NON-METAL =THEY GENERALLY HAVE LOW DENSITY.

(LUSTER)

⚫METALS HAVE A SHINING SURFACE SO THEY KNOWN AS METALLIC LUSTER.

⚫NON-METAL =THEY HAVE DULL APPEARANCE THAT THEY ARE NON-LUSTROUS.

2.METALLOIDS= THERE ARE SOME ELEMENTS WHICH SHOWS THE PROPERTIES OF METALS AS WELL AS NON-METAL. SUCH ELEMENTS ARE CALLED METALLOIDS. FOR EXAMPLE >>
(Si) silicon, (Ge) germanium AND (As) arsenic.

$<marquee>SARIKA$

May this helps you ✔️✔️◽◾◽◾◽◾

Answer 2

Answer:

A metalloid is a chemical element that exhibits some properties of metals and some of nonmetals. ... Boron, silicon, germanium, arsenic, antimony, tellurium, and polonium are metalloids. In some cases, authors may also class selenium, astatine, aluminum, and carbon as metalloids, but this is less common. Elements: Germanium; Polonium; Silicon; Selen

Explanation: