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Which of these is an example of a chemical change?
22
the atomic structure of atoms is changed and/or cannot be returned back to its original state
valence electrons
its number of protons and neutrons
the amount of mass per volume something has D= m/v
ion
atoms
paper burning
On the periodic table, an element's atomic mass is made of...
22
the atomic structure of atoms is changed and/or cannot be returned back to its original state
valence electrons
its number of protons and neutrons
the amount of mass per volume something has D= m/v
ion
atoms
paper burning
Argon is an element that has an atomic number of 18. It has an atomic mass of 40. How many neutrons are there in Argon?
22
the atomic structure of atoms is changed and/or cannot be returned back to its original state
valence electrons
its number of protons and neutrons
the amount of mass per volume something has D= m/v
ion
atoms
paper burning
The electrons in the outermost cloud of an atom that determine whether an atom will combine with another to form a compound are called
22
the atomic structure of atoms is changed and/or cannot be returned back to its original state
valence electrons
its number of protons and neutrons
the amount of mass per volume something has D= m/v
ion
atoms
paper burning
When sodium combines with chlorine to form salt, sodium loses an electron and chlorine gains an electron. Each separate atom is now called a what?
22
the atomic structure of atoms is changed and/or cannot be returned back to its original state
valence electrons
its number of protons and neutrons
the amount of mass per volume something has D= m/v
ion
atoms
paper burning
A chemical change takes place when
22
the atomic structure of atoms is changed and/or cannot be returned back to its original state
valence electrons
its number of protons and neutrons
the amount of mass per volume something has D= m/v
ion
atoms
paper burning
Density is...
22
the atomic structure of atoms is changed and/or cannot be returned back to its original state
valence electrons
its number of protons and neutrons
the amount of mass per volume something has D= m/v
ion
atoms
paper burning
The building blocks of all matter are...
22
the atomic structure of atoms is changed and/or cannot be returned back to its original state
valence electrons
its number of protons and neutrons
the amount of mass per volume something has D= m/v
ion
atoms
paper burning
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