List two ways in which heterogeneous mixtures differ from elements.

1. They could be composed by elements, compounds or molecules and the difference among the constituents is evident.

2. They could have more than one different atom forming the mixture.

Explanation:

Hello,

In this case, elements, such as hydrogen, nitrogen, gold, silver, etc, are those we find in the periodic table composed by protons, neutrons and electrons as their basic constituents forming only one atom. Moreover, heterogeneous mixtures are composed by elements, compounds or molecules in which we could see the difference between the constituents for instance, cornflakes in milk, ice in soda, soil, etc. Therefore, two ways heterogeneous mixtures differ from elements are:

1. They could be composed by elements, compounds or molecules and the difference among the constituents is evident.

2. They could have more than one different atom forming the mixture.

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the answer is c.the valence of the atoms combine .