Which is most likely a solid at room temperature?

a)
chlorine

b)
hydrogen

c)
neon

d)
potassium

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

The point along a planet's orbit where it is closest to the sun is called the