What does atomic number refers to?
What will be an ideal response?
the number of protons in an atom
You might also like to view...
A person gazes at a very distant light source. If she now holds up two fingers, with a very small gap between them, and looks at the light source, she will see
A) a series of bright spots. B) the same thing as without the fingers, but dimmer. C) a hazy band of light varying from red at one side to blue or violet at the other. D) a sequence of closely spaced bright lines.
Quasars are most common with red shifts
a. less than 0.1 b. less than 0.5 c. of about 2 d. greater than 6 e. greater than 8
Which is a characteristic of dwarf planets? a. They possess an asymmetrical or irregular shape
b. Their orbit is highly elliptical and far from the Sun. c. They must reside within the Kuiper belt or Oort cloud. d. They have insufficient gravitational pull to clear their neighborhood. e. They cross the orbit of other planets during its own revolution.
To see his full height, Blinky Bill who is 1 meter tall needs a mirror that is at least
A) 0.33 m tall. B) 0.50 m tall. C) 0.75 m tall. D) 1 m tall. E) depends on distance from the mirror.