Advertisements
Advertisements
प्रश्न
State a reason why the symbol of calcium is ‘Ca’ and of copper is ‘Cu’
Advertisements
उत्तर
As the name calcium and copper start with same letter of English alphabet ‘C’ so another letter from the name of the element is added to ‘C’.
Hence symbol of calcium is ‘Ca’ and symbol of copper or cuprum (Latin name of copper) is ‘Cu’.
APPEARS IN
संबंधित प्रश्न
What do you understand by :
Noble gases
The atomic number of an element X is 13. What will be the number of electrons in its ion X3+ ?
Explain the terms ‘chemical formula’.
Match the formulas of the following of bases with their correct names.
Bases – (a) NaOH (b) KOH (c) Ca(OH)2 (d) Zn(OH)2
Names – (1) Potassium hydroxide (2) Zinc hydroxide (3) Aluminium hydroxide (4) Calcium hydroxide (5) Sodium hydroxide
In the chemical word equation –
Zinc + Sulphuric acid → Zinc sulphate + Hydrogen.
State the reactants and products of the above reaction. What does the arrow indicate?
State the type of element for the following:
Carbon
Write the radical of the following valency:
Zinc
Give a reason – Magnesium [2, 8, 2] has valency 2+.
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Lead
write symbol with the variable valency
The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.
