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1
HERE ARE THE CLUES:
Matter is generally classified into to groups. The first group of substances is.
called mixtures. The other is known as pure substances. Under this category is
which is composed of only one kind of atom. These substances are
which is like a map that gives picture of the
relationships among the elements. The table is organized in increasing
that indicates the number of electrons present in the element's
arranged in a
atom.
2
Elements with similar properties are placed in columns called
or families. The rows in the table are called
consecutively from 1 to 7.
5.
They are numbered


Sagot :