The number of valence electrons of an element can be determined by the periodic table group (vertical column) in which the element is categorized
Ionic compounds. because when in solid form they are held firmly in place therefore they cannot move to conduct electric current.
The correct answer would be D: Physical properties can be observed without changing the identity of a substance
I don't know what your asking so Identify means your self
Answer:
i the answer to your question should be C
Explanation:
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