Unit 3 Quiz: Honors chemistry -- Study Guide Flashcards
A subatomic particle that has about the same mass as a proton, but with no electrical charge, is called a(n)
neutron
Which one(s) have a mass of 1 amu?
proton and neutron
What scientist discovered the nucleus?
Ernest Rutherford
Which scientist discovered the electron?
JJ Thomson
Which scientist discovered the neutron?
James Chadwick
Which scientist thought the atom was the smallest particle
John Dalton
Isotopes of an element contain different numbers of what?
neutrons
All atoms of the same element have the same what?
atomic number
A sulfur particle consists of 16 protons, 18 electrons, and 17 neutrons. Its charge is what?
-2
How many protons are in 28 Al 3+?
13
How many electrons are in 28 Al 3+?
10
How many neutrons are in 28 Al 3+?
15
As the mass number of the isotopes of an element increases, the number of protons what?
remains the same
How many protons are in 32 S 2-?
16
How many neutrons are in an atom of chlorine?
18