Advertisements
Advertisements
प्रश्न
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
पर्याय
X is a metal
Y is a metal
Z is a non-metal
Y is a non-metal and Z is a metal
उत्तर
Y is a non-metal and Z is a metal
Explanation -
Out of X, Y and Z, X and Y are non-metal and Z is a metal.
APPEARS IN
संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
What is an alloy? How is an alloy made?
Aluminium is not used to make :
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
Write name.
The device used for grinding an ore.
Write scientific reason.
Anodes need to be replaced from time to time during the electrolysis of alumina.
Soft metal : Na : : hard metal : _______
Give reasons for the following.
- Aluminum foils are used to wrap food items.
- Immersion rods for heating liquids are made up of metallic substances.
- Sodium and potassium are stored in kerosene.
- Mercury is used in thermometers.
Why are metalloids called semimetals?
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
