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PhySci Ch6
Test Description: PhySci Ch6
Instructions: Answer all questions to get your test result.
1) the total of the masses of the particles in an atom
A
atomic mass
B
nucleus
C
fusion
D
electron
2) a unit used to measure the mass of an atom; 1/12 the mass of a carbon-12 atom
A
atomic mass
B
atomic mass unit
C
atomic number
D
electron
3) the number of protons in the nucleus of an atom
A
atomic number
B
atomic mass unit
C
electron
D
proton
4) a negatively charged particle with an extremely small mass
A
mass number
B
neutron
C
electron
D
orbitals
5) a region in an atom that contains electrons of a certain energy
A
fission
B
fusion
C
isotopes
D
energy level
6) the splitting of a nucleus
A
protons
B
fission
C
fusion
D
orbitals
7) the joining together of smaller nuclei into a larger one
A
proton
B
electron
C
fusion
D
fission
8) different forms of the same element that have different numbers of neutrons
A
atomic mass
B
orbitals
C
nucleus
D
isotopes
9) the sum of the protons and neutrons in the nucleus of an atom; also known as atomic mass
A
fusion
B
mass number
C
electron
D
atomic mass
10) a neutral particle in the nucleus of an atom, with approximately the same mass as a proton
A
energy level
B
proton
C
neutron
D
atomic mass unit
11) the center of an atom, which contains protons and neutrons
A
fission
B
electron
C
nucleus
D
isotopes
12) regions of most probable location of electrons
A
radioactivity
B
neutron
C
proton
D
orbitals
13) a positively charged particle in the nucleus of an atom; 1836 times heavier than an electron
A
electron
B
atomic number
C
energy level
D
proton
14) the emission of rays and particles from an unstable nucleus
A
radioactivity
B
fission
C
atomic number
D
fusion
*select an answer for all questions
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