Evidence of a chemical reaction includes
A) a color change.
B) a change in temperature.
C) the production of a gas.
D) All of the above.
Correct Answer:
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Q10: What type of chemical bond does the
Q11: An atom becomes a positive ion by
Q12: Ionic compounds are generally
A)white, crystalline solids.
B)gaseous substances.
C)syrupy
Q13: The representative elements have one to eight
Q14: The -ide ending in nitrogen dioxide tells
Q16: Consider the electron dot diagram of the
Q17: Atoms gain or lose electrons in chemical
Q18: The smallest unit of a covalent compound
Q19: Three hydroxide ions are needed to form
Q20: Atoms that have eight valence electrons would
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