The most reactive of all elements is
a. hydrogen.
b. fluorine.
c. chlorine.
d. sodium.
b
You might also like to view...
Why does Mars have seasons similar to the Earth?
a. Mars is roughly the same distance from the sun as Earth. b. Mars has the same size as the Earth. c. The shape of Mars' orbit is the same as the Earth's. d. Mars' rotational axis is tilted relative to its orbit like the Earth's.
A gold dealer has three blocks of solid gold. He informs you that the first block would weigh one pound on the very massive planet Jupiter, that the second block would weigh one pound on the moon, and that the third block would weigh one pound on
Earth. Which block of gold would make you the richest? NOTE: On Jupiter, you would weigh nearly three times your normal weight. A) The third block. B) The first block. C) Each of them would make you equally rich because they each contain the same amount of gold. D) The second block.
Relative to the frame of the observer making the measurement, at what speed parallel to its length is the length of a meterstick 60 cm?
A) 0.60c B) 0.70c C) 0.50c D) 0.90c E) 0.80c
Atoms in crystals are typically separated by distances of 0.10 nm
What kinetic energy must a nonrelativistic electron have, in electron-volts, in order to have a wavelength of 0.10 nm? (melectron = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)