The given question is incomplete as the options are not provided. The correct options for this questions are as follows-
(1) Good heat conductivity
(2) Good electrical conductivity
(3) Low melting point
(4) High melting point
Thus, the question now is solved below as:
Answer:
Option (3)
Explanation:
Molecular substances are simply defined as those substances that are comprised of more than two atoms and are interlinked with one another. These atoms are linked with each other by the weaker intermolecular forces. This weak bond reflects the low and high melting point of the substance.
These molecular substances differ from the molecular compounds because, in the case of molecular compounds, the atoms are linked with one another by a strong covalent bond.
Thus, the correct answer is option (3).
Earth's surface warms up in the sunlight. At night, Earth's surface cools, releasing the heat back into the air. But some of the heat istrapped<span> by the greenhouse </span>gases<span> in the </span>atmosphere<span>. ... Greenhouse </span>effect<span> of Earth's </span>atmosphere<span> keeps some of the Sun's energy from escaping back into space at night.</span>
centre of square disrance to each corner found by Pythagoras' theorem.
coulombs law used to clculate field of each charge at centre
fields added vectorially for res
W = mg = 350 newton
m = W/g = 350/9.8 = 35.71 kg
on mars
W = mg = 134 newton
g = W/m = 134/35.71 = 3.75 meters/second2
Answer D
In alkali earth metals reacrivity increases from top to bottom (opposite of b)
This is because as you go down, the electron shells increase by 1 shell. The farther away a shell is from the nucleus, the higher its tendency to react.
D is true because the more reactive an alkali metal is, the more vigorous the reaction will be with water.