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Which is the negatively charged particle located outside the nucleus of an atom?
number of neutrons
formation of new atoms
Heat added to initiate a reaction.
seven
1
electron
one
conservation of mass
In the periodic table of the elements, elements in Group 1 have how many outer electrons?
number of neutrons
formation of new atoms
Heat added to initiate a reaction.
seven
1
electron
one
conservation of mass
What principle can be applied to all chemical reactions?
number of neutrons
formation of new atoms
Heat added to initiate a reaction.
seven
1
electron
one
conservation of mass
Which cannot take place during a chemical reaction?
number of neutrons
formation of new atoms
Heat added to initiate a reaction.
seven
1
electron
one
conservation of mass
An atom of fluorine has nine electrons. Its second energy level has _________ electrons.
number of neutrons
formation of new atoms
Heat added to initiate a reaction.
seven
1
electron
one
conservation of mass
How many different kinds of atoms does an element contain?
number of neutrons
formation of new atoms
Heat added to initiate a reaction.
seven
1
electron
one
conservation of mass
One isotope of carbon differs from another in which way?
number of neutrons
formation of new atoms
Heat added to initiate a reaction.
seven
1
electron
one
conservation of mass
Which is the best description of activation energy?
number of neutrons
formation of new atoms
Heat added to initiate a reaction.
seven
1
electron
one
conservation of mass
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