Multiple Choice
The sodium atom has an atomic number of 11 and an atomic weight of 23.The neutral atom contains
A) 11 neutrons and 12 protons.
B) 11 protons and 12 neutrons.
C) 12 electrons and 11 neutrons.
D) 23 protons and 12 electrons.
E) 23 electrons and 12 neutrons.
Correct Answer:
Verified
Correct Answer:
Verified
Q86: The unifying concepts in physics are the
Q87: A radioactive source has a half-life
Q88: A sphere of radius r<sub>1</sub> collides
Q89: An old piece of dead wood
Q90: A thermal neutron<br>A)produces electrons by thermionic emission.<br>B)produces
Q92: Which of these nuclear reactions is possible?<br>A)
Q93: As <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6079/.jpg" alt=" As
Q94: The intensity of gamma rays passing
Q95: A certain radioactive element has a half-life
Q96: The half-life of radium is about 1600