Advertisements
Advertisements
Question
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Advertisements
Solution
All the elements can be divided into following three groups:
- Metals: Examples: Aluminium and copper
- Non-metals: Examples: Potassium and calcium
- Metalloids: Examples: Arsenic and antimony
APPEARS IN
RELATED QUESTIONS
What are the conditions for 'something' to be called 'matter'?
Name the scientist who studied the movement of pollen grains suspended in water through a microscope. What is this phenomenon known as?
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Fill in the following blanks with suitable words :
Immiscible liquids are separated by using a .....................
How will you separate a mixture of iron filings and powdered carbon ?
Explain how, nitrogen , oxygen and argon gases are separated from air.
Which of the following mixture cannot be separated by using water as the solvent ?
The technique which is used to separate particles of a solid suspended in a liquid quickly is called :
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
Diffentiate between absorption and adsorption.
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Intermolecular space is maximum in ______.
Solids do not flow.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
Define the term matter.
Define the term matter.
Define the term matter.
