Which of the following is an example of a chemical change?
Boiling water
Burning paper
Dissolving sugar in water
Melting gold

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Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent