Question
What is an element? What are the different types of elements.
✓
Answer
- A substance which cannot be decomposed into simple substances by any physical or simple chemical method is called as an Element.
- An element is composed of atoms of only one kind.
- The different types of elements are:
(a) Metals – Examples: Gold, Silver, etc.
(b) Non-metals – Examples: Carbon, Sulphur, etc.
(c) Metalloids – Examples: Silicon, Antimony, etc.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Petrol, diesel, coal are fossil fuels.
Explain any two space observation telescope.
Explain how powder coating is done.
Give the uses of radioactive isotopes in Medical science.
Write the structure and function of the following connective tissues:
(a) Blood
(b) Lymph
(c) Areolar tissue
(d) Adipose tissue
(e) Cartilage
(f) Bones
(g) Tendons and ligaments
(a) Blood
(b) Lymph
(c) Areolar tissue
(d) Adipose tissue
(e) Cartilage
(f) Bones
(g) Tendons and ligaments
Find the expression (i.e., derive the expression) for the resistors connected in parallel.
Apparatus : Pencil, electrical wires, battery/ cell, small bulb, water, kerosene, test tube, lead pencils, etc.
Procedure : Remove the lead from a pencil and arrange the apparatus as shown in the above diagram. Note your observations for the following.
(a) What is the colour of lead in the pencil? .
(b) Try to break lead with your hand.
(c) Start the electric current in the circuit and observe. What did you find?
(d) Take some water in a test tube. Take some kerosene in another test tube. Put lead dust in both the test tube. What did you observe?
What sign conventions are used for reflection from a spherical mirror?
Write the characteristics of the plants belonging to division Bryophyta.
Write about artificial food colours, the substances used in them and their harmful effects.