parts of atom
M's
differences
two of each letter
si units
100
the number in the outer shell tells us a lot about reactivity
What is an electron
100
when substances are combined physically but not chemically
What is a mixture
100
the difference between a product and a reactant
What is end result (p) and what is combined (r)
100
H and He
What is Hydrogen and Helium
100
time
What is second
200
the number tells us what element an atom is
What is a proton
200
cannot be seen by the unaided human eye
What is microscopic
200
chemical change and physical change
What is ... only chemical changes create a new chemical
200
N and Ne
What is nitrogen and neon
200
distance
What is meter
300
The part of an atom that contains most of the mass but at the the same time little of the volume of an atom
What is a nucleus
300
two or more atoms combined chemically
What is a molecule
300
covalent and ionic bonds
What is covalent bonds involve sharing of electrons while ionic one atom takes the electron.
300
Mn and Mg
What is Manganese and Magnesium
300
mass
What is kilogram
400
these are formed when there is an extra neutron or two or three in the nucleus
What is an isotope
400
the number of atoms needed to weigh the atomic weight of an element
What is a mole
400
Homogenous and Heterogeneous
What is homogenous means equally distributed or same throughout, Heterogeneous means unequally distributed
400
Na and Ni
What is sodium and nickel
400
temperature
What is kelvin
500
formed when an atom gains or loses an electron
What is an ion
500
Name the two properties of matter
What is mass and volume
500
cation and anion
What is cations have positive charge and anions have negative charge
500
Cr and Cu
What is chromium and copper
500
electric current
What is ampere
M
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