Question 1 Name the building blocks of matter? Question 2 Name the subatomic particles in atoms? Question 3 Give an example to show that there are charged particle in matter? Structure of an atom Atoms and molecules are the building blocks of matter. Atoms are made up of three subatomic particles: electrons, protons, neutrons. Electrons are negatively … [Read more...] about Structure of an Atom
Class 9
Mole Concept
Question 1 Define a mole? Question 2 What is the value of Avogadro's constant? Question 3 Define mole of an atom? Question 4 Define mole of a molecule? Question 5 Write the formula to calculate the number of moles? Mole Concept In a chemical reaction equation,it is more convenient to use quantity of substance in number of its molecules or atoms rather … [Read more...] about Mole Concept
Gram Molecular Mass
Question 1 What is gram molecular mass? Gram Molecular mass The amount of a substance whose mass in grams is numerically equal to its molecular mass,is called gram molecular mass of that substance. The molecular mass of a substance expressed in grams is called gram molecular mass. To write gram molecular mass of a substance ,we write its molecular mass and then … [Read more...] about Gram Molecular Mass
Valency of Ion
Question 1 Define the term valency? Question 2 What are monovalent ion. Give example? Question 3 What are divalent ion. Give example? Question 4 What are trivalent ion. Give example? Question 5 What do you mean by chemical formulae of a compound? Question 6 What are the steps to write chemical formulae of a compound? Question 7 What is gram atomic … [Read more...] about Valency of Ion
Ions
Question 1 What are ions? Question 2 How an ion is formed? Question 3 How a cation is formed. Give example? Question 4 How an anion is formed. Give example? Question 5 What are simple ions. Give example? Question 6 What are complex ions. Give example? Question 7 What are ionic compounds? Question 8 Define formula unit of an ionic compound? Question 9 … [Read more...] about Ions