An atom is_____________
(A) smallest indivisible particle in an element
(B) smallest particle of an element which can undergo a chemical reaction
(C) building block of an element
(D) always smaller than molecule
All of the following statements are incorrect except:
(A) Precision and accuracy should go side by side in a scientific work
(B) Scientific work must be precise, accuracy is not essential
(C) Scientific work must be accurate, precision is not essential
(D) Calculations must be made before any experiment
Two automobiles are 150 kilometers apart and traveling toward each other One automobile is moving at 60km/h and the other is moving at 40km/h mph In how many hours will they meet
(A) 2.5
(B) 2.0
(C) 1.75
(D) 1.5
(D) 1.25
The average speed of a moving object during a given interval of time is always:
(A) the magnitude of its average velocity over the interval
(B) the distance covered during the time interval divided by the time interval
(C) one-half its speed at the end of the interval
(D) its acceleration multiplied by the time interval
(D) one-half its acceleration multiplied by the time interval
"Each electron in an atom must have its own unique set of quantum numbers" is a statement of_______________
(A) Aufbau principle
(B) Pauli exclusion principle
(C) Hund's rule
(D) Periodic law
Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy
(A) radio, visible, infrared, ultraviolet, x-ray, gamma ray
(B) radio, infrared, visible, x-ray, gamma ray, ultraviolet
(C) visible, radio, infrared, ultraviolet, x-ray, gamma ray
(D) radio, infrared, visible, ultraviolet, x-ray, gamma ray
Which of the following has the largest wavelength
(A) visible light
(B) x-rays
(C) infrared light
(D) ultraviolet radiation
Which of the following has the highest energy
(A) gamma rays
(B) X-rays
(C) Ultra-violet radiation
(D) radio waves
All of the following are electromagnetic radiations except__________
(A) Red light
(B) Sound waves
(C) X-Rays
(D) Photon