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unit 2 science test

QuestionAnswer
how do you find neutrons subtract the mass number from the proton number
how do you find the mass number add the protons and neutrons together
what subatomic particle has no charge neutron
Atoms of the same element with different numbers of neutrons are called isotopes
Particles and energy given off by unstable isotopes are called radiation
An alpha particle is 2 protons and 2 neutrons
A beta particle is a neutron that falls apart into a proton and an electron
The most damaging and dangerous type of radiation is gamma rays
An alpha particle can be stopped by a piece of paper
A beta particle can be stopped by aluminum
An electron returning to ground state after a quantum leap will give off energy in the form of... heat and light
The number or electrons in the valence shell determines the ... of the element. chemical properties
Atoms with 8 electrons in their valence shell are chemically unreactive
atoms are made of nucleus
where can electrons be found shells, orbitals, quantums, energy levels
the sum of neutrons and protons mass number
average mass number atomic mass
subtract the mass number from the proton number neutrons
a neutron is made of 1 proton and 1 electron
the mass number is the mass of 1 atom of an element
the atomic mass tells you the .... mass of a typical atom of an element average
the isotopes of an atom differ by neutrons
by measuring how much C-14 is left, we can estimate how long ago that thing... died
Which number reports an average mass for a sample of an element? atomic mass
Created by: n0rth3rn
 

 



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