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12 questions
The Periodic Table of Elements is arranged by
atomic mass
atomic number
valence electrons
number of isotopes
How do you find the mass number?
round the atomic number to the nearest whole number
round the atomic mass to the nearest whole number
pick one of the numbers on the square
it doesn't exist
This is a subatomic particle that is found in the nucleus of an atom and has a neutral charge.
proton
neutron
electron
matter
How many protons does Aluminum have?
13
27
14
26.98
What is the atomic number of Fe?
26
55.845
56
None of these
How many electrons does Lithium have (atomic mass = 6.94)
3
4
6.94
24.94
Atoms of different elements MUST have different ____ numbers.
mass
atomic
neutron
electron