Metalloids

Q. Difference between metalloids , metals and non metals .

Q.

The element which is not an example of a metalloid is:

1. Silicon

2. Arsenic

3. Boron

4. Chlorine

Q.

Antimony is an example of a metal.

1. True

2. False

Q.

(a) What are metalloids? Name two metalloids.

(b) Classify the following elements into metals, non-metals, and metalloids:

Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.

Q.

Why are transition metals reactive?

Q.

Sulphur is a metalloid.

1. True
2. False

Q. Question 20
Three elements B, Si and Ge are

(a) metals
(b) non-metals
(c) metalloids
(d) metal, non-metal and metalloid respectively

Q.

Mercury, carbon and bromine are elements.

1. False

2. True

Q.

Malleability is the property of:

1. Metals are burnt into ashes.

2. Hammering metal into thin sheets.

3. Producing sound when beaten.

4. Drawing metal into wire.

Q. Why different metals have different melting pointsoon? ? ? ?

Q. What is a metalloid?

Q.

Why are rare Earth metals so important?

Q.

Name three metals that can hold heavy weights without breaking.

Q.

Name 3 Noble Metals. [3 MARKS]

Q.

In nature, metals are mostly found as compounds called ______ .

Q.

Which material is not a good semiconductor?

Q.

_________ have properties intermediate between those of metals and nonmetals.

Q.

Group of element which is most likely to be present in an explosive substance???

Q. Which of the following is the best representation of malleability?

1. Striking a metal to produce sound
2. Using metal wires to conduct electricity
3. Hammering metals into sheets
4. Drawing metals into wires

Q. Question 1
Which of the following is not a metal?

(a) copper
(b) sulphur
(c) aluminium
(d) iron

Q.

Metals like $\mathrm{Na},\mathrm{K},\mathrm{Ca}\mathrm{and}\mathrm{Mg}$ never found in their free state in nature. Explain the statement.

Q.

The chemistry of alkali metals is essentially the chemistry of uni positive ions because

1. They have low Ionization energy values

2. they have strong tendency to lose single valence electron

3. Second Ionization energy values are very high

4. All the above

Q. Part of the periodic table showing p-block is depicted below. What are the elements shown in the zig-zag boxes called? What is the nature of the elements outside this boundary on the right side of the table?

1. Transition elements, metalloids
2. Metals, non-metals
3. Metalloids, non-metals
4. Non-metals, noble gases

Q.

What will called the metal with both the properties of metals and non-metals?

Q. The three elements boron, silicon and germanium belong to :

1. non - metals
2. metalloids
3. all of the above
4. metals

Q.

Metals can be a lot of a strain and therefore have a high ______________.

Q. The borderline elements, which neither fit with metals nor with non-metals are known as:

1. Metalloids
2. Isotopes
3. Allotropes
4. Alloys

Q.

In the elements of the third period : Na , Mg, Al, Si, P, S, Cl and Ar, Choose metals

Q.

Which elements block is used to keep a radioactive substance ?

1. Chromium

2. Lead

3. Iron

4. Gold

Q. Which of the following pairs of elements are metalloids?

1. Selenium, chlorine
2. Germanium, sodium
3. Antimony, nitrogen
4. Tellurium, arsenic