Standard Chemistry Unit 3 Review

Which answer below describes a pair of isotopes?

Which of the following was not determined by J. J. Thomson is the cathode ray tube experiment?

Which statement about the gold foil experiment is not true?

Where in the atom are the neutrons located?

Element X has three isotopes 72.0 % X-60, 19.2 % X-61, and 8.8% X-62. What is the average atomic mass?

How many neutrons are in the atom represented by this symbol?

Which two subatomic particles have the same mass?

What is the mass number of an atom with 20 protons and 21 neutrons?

Which subatomic particle has a very small mass and a negative charge?

Which element has an atomic number of 16?

Some of the statements from Dalton's atomic theory appear below. Which is no longer considered true?

Which experiment discovered the exact mass and charge of an electron?

Which answer below best describes a charged particle?

Where in an atom are the protons located?

What is the mass number of an atom of sodium with 11 neutrons?

In Millikan's oil drop experiment, which forces were acting in opposition to suspend the oil drop?

Which experiment disproved the plum pudding model of the atom?

How many protons, neutrons, and electrons are represented by this image?