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When α -particles are sent through a thin metal foil, most of them go straight through the foil because (one or more are correct):
(1) Alpha particles are much heavier than electrons
(2) Alpha particles are positively charged
(3) Most part of the atom is empty space
(4)Alpha particles move with high velocity
Ans: Most part of the atom is empty space
difference between lantanoids and actinoids
The nucleus of the element 21 E 45 contains: (1) 45 protons and 21 neutrons (2) 21 protons and 24 neutrons (3) 21 protons and 45 neutrons (4) 24 protons and 21 n
Explain in brief about the Wire drawing Drawing: Refers to shaping in a punch press of flat blanks of sheet metal into different shapes. This process is fundamentally forcing
Factor of affecting conductions
why halogens are both +R and -I groups?
1st A group because the oxides and hydrides are alkaline in nature.
The shape of d xy orbital will be: (1) Circular (2) Dumb-bell (3)Double dumb-bell (4) Trigonal Ans: Double dumb-bell
As electron moves away from the nucleus, its potential energy: (1) Increases (2) Decreases (3) Remains constant (4) None of these Ans: Increases
two containers are connected by a stopcock. gas A is at pressure 202kpa while gas B is at pressure 140kpa, what will be the resultant pressure when the stopcock is opened
Ask questionfreezing point as exemple of colligative propertiy. #Minimum 100 words accepted#
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