Advertisements
Advertisements
प्रश्न
Fill in the blank
The most abundant element in the earth’s crust is _______.
Advertisements
उत्तर
The most abundant element in the earth’s crust is oxygen.
APPEARS IN
संबंधित प्रश्न
Define: Compounds
Define:
Atomicity
Fill in the blank
_________ refers to the number of atoms in the molecule of an element
Fill in the blank
The most abundant element in the atmosphere is _______.
Complete the statement given below by filling in the blank with the correct word.
An element is a pure substance which cannot be broken down by physical or _________ methods.
Select the correct answer from the choice given below.
An impure substance
‘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.
Higher Order Thinking Skills.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
Classify the substances given in Fig. 2.2 into elements and compounds
