Page 1 of True/False: Read each question carefully and select the most appropria
ID: 567181 • Letter: P
Question
Page 1 of True/False: Read each question carefully and select the most appropriate answer. 22) Protons and electrons reside in the nucleus of an atom. 23. Energy is the capacity to do work. 24 Changes in state such as melting and boiling are physical changes. 25. Electrons are negatively charged and have the smallest mass of the three subatomic part 26 The base unit for mass in the metric system is kilograms (kg). 27. The base unit for volume in the metric system is liter (L). 28. The element symbol for iron is Fe. 29. All atoms of the same element contain the same number of protons. g sugar in water involves a chemical change. 31. The element symbol S represents sodium. ant myanseExplanation / Answer
22. false. since electrons reside out side the nucleous not insode. Protons reside in the nucleous.
24 True . because melting or boiling can not chage the chemical composition. so it is only physical change.
26. True yes it is kg
30. False. Disolution cann not change chemical composition. Hence it is only physical change not a chemical change
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