Question

A student performs some activities on two substances and records the observations in a table as shown. Which option classifies the substances into metals and non-metals? *

Answer 1

Answer:

The following table shows the test a student performed on four different aqueous solution which are X, Y, Z and W. Based on the observations provided, identify the action present.

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Answer 2

Although your question is incomplete, you may be referring to:

A student performs some activities on two substances and records the observations in a table as shown.

Activity                                   Substance M                               Substance N

Cut with a knife                Forms small pieces                     Forms small pieces

Beaten with hammer          Shape changes                   Changes into powder

Stricken with a metal rod      Makes a sound                 Changes into powder

Which option classifies the substances into metals and non-metals?

(a) both the substances are metals

(b) both the substances are non-metals

(c) substance M is metal while substance N is non-metal

(d) substance M is non-metal while substance N is a metal

According to the observations, the correct option is:

Substance M is metal while substance N is non-metal. (option C)

Metals vs Non-metals

• Substances are classified as metals or non-metals based on certain characteristics like:

1. Metallic luster vs dull appearance of non-metals
2. Electropositive metals vs electronegative non-metals
3. Metals are good conductors of electricity, whereas non-metals are not.

Observations of The Activity

• In the activity, the following is observed:

1. Both substances M and N form small pieces when cut with a knife.

• This property is common for metals and non-metals.

2. Substance M changes shape while substance N changes into powder when beaten with a hammer.

• The property of metals to be beaten into sheets is called malleability. This proves M is a metal.
• Non-metals are brittle, hence they break into powder when beaten with a hammer.

3. Substance M makes a sound while substance N changes into powder when stricken with a metal rod.

• Metals can produce sound, hence they are called sonorous.
• Non-metals are non-sonorous.

Therefore, the correct option is (c) substance M is metal while substance N is non-metal.