Advertisements
Advertisements
प्रश्न
State the type of element for the following:
Boron
पर्याय
Metal
Non-metal
Metalloid
Noble gas
उत्तर
Metalloid
APPEARS IN
संबंधित प्रश्न
Select elements and compounds from the following list: Iron, plaster of paris, chalk, common salt, copper, aluminium, calcium oxide, cane sugar, carbon, silica, sodium sulphate, uranium, potassium carbonate, silver, carbon dioxide.
Name the element used as a standard for atomic mass scale.
The symbols of the elements cobalt, aluminium, helium and sodium respectively written by a student are as
follows. Which symbol is the correct one ?
Fill in the blank:
Symbol represents _____ atom(s) of an element.
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
Give the symbol of the following element:
Mercury
Write the radical of the following valency:
Oxygen
Write the chemical formula of the following:
magnesium oxide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Hydroxide
What does the symbol '⇌' present in a chemical equation, mean?