What is formed when an atom loses or gains an electron?
a. a new element
b. ion
c. molecule
d. bond
e. isotope
b
You might also like to view...
A thin film of soapy water, n = 1.37, is held vertical. Light of wavelength 600 nm is reflected from the film and horizontal dark lines appear. What is the thinnest soap film for which a bright band will occur?
A. 150 nm B. 109 nm C. 90.0 nm D. 438 nm E. 219 nm
Basic Postulates: You are riding in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. How can you do this?
A. You can determine if the ship is moving by determining the apparent velocity of light in the spaceship. B. You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving. C. You can determine if the ship is moving by lying down and measuring your height. If you are shorter than usual, the ship is moving. D. You should give up because you have taken on an impossible task!
Which of the following would increase the gravitational force between two objects?
A) Moving the two objects closer together. B) Moving the two objects farther apart. C) Reducing the mass of either one of the objects. D) None of these.
Which of the following provided the first observational in support of the predicted existence of gravitational waves?
A) the orbit of a star system consisting of two neutron stars that is slowly decaying in a way consistent with energy being carried away by gravitational waves B) the energy generated by gravitational waves from the Sun that can be seen as it is absorbed by Jupiter C) gravitational waves detected by the Hubble Space Telescope D) photographs of spacetime that show the gravitational waves as ripples that are clearly visible