Advertisements
Advertisements
Question
Differentiate metals and non-metals.
Advertisements
Solution
| Metals | Non-Metals |
| Metals are lustrous. They have a shiny | Non metals are non lustrous. They |
| surface | have non- shiny surface |
| Metals are generally hard | Non-metals are generally soft |
| Most metals are bendable | Non-metals are non bendable |
| Most metals can be bent, beaten into sheets and they can drawn into wires | Non-metals are non ductile |
| Most metals are good conductors of electricity | Non-metals are bad conductors of electricity |
| Most metals are good conductors of heat | Non-metals are bad conductors of heat |
| Most metals are making ringing sound when struck. Hence, they are used to make objects like bells | Non-metals does not make any sound when they struck |
| Ex. : Copper, Lead, Tin, Nickel | Ex. : Carbon, Iodine, Sulphur |
APPEARS IN
RELATED QUESTIONS
Name a soft metal.
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
Name: a Metal Which is brittle
Give two examples of the following.
Non-metals which are lustrous
Give reason: Graphite is used to make a lead of the pencils.
Tick (√) the correct alternative from the choice given for the following statement
The hardest naturally occurring substance
Match the compounds in List I – 1 to 20 with their correct formulas from in List II-A to T.
| List I | List II | ||
| 1 | Hydrochloric acid | A | NaCI |
| 2 | Potassium Hydroxide | B | NaOH |
| 3 | Sulphuric Acid | C | KCI |
| 4 | Zinc Hydroxide | D | Ca(OH)2 |
| 5 | Sodium Chloride | E | CaS |
| 6 | Nitric Acid | F | CuSO4 |
| 7 | Calcium Hydroxide | G | CaCO3 |
| 8 | Carbonic Acid | H | NH4CI |
| 9 | Sodium hydroxide | I | HCI |
| 10 | Copper sulphate | J | ZnO |
| 11 | Potassium Chloride | K | HNO3 |
| 12 | Calcium Carbonate | L | H2CO3 |
| 13 | Magnesium Sulphide | M | MgS |
| 14 | Zinc Sulphate | N | MgO |
| 15 | aluminium Hydroxide | O | KOH |
| 16 | Sodium Carbonate | P | ZnSO4 |
| 17 | Calcium Sulphide | Q | Na2CO3 |
| 18 | Magnesium Oxide | R | H2SO4 |
| 19 | Zinc Oxide | S | AI(OH)3 |
| 20 | Ammonium Chloride | T | Zn(OH)2 |
Select the correct answer to the statement given below:
A metalloid
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.
Give an example for the elements derived from their Latin names.
