e. 400 K 21. How many protons and electrons are present in a Fe ion? a. 24 proto

Question

e. 400 K 21. How many protons and electrons are present in a Fe ion? a. 24 protons and 26 electrons b. 26 protons and 26 electrons c. 26 protons and 24 electrons d. 28 protons and 26 electrons e. None of the previous answers. 22. Which of the following statements is not true? a. b. c. d. e. Matter is anything that has volume and takes up space. Molecules are made of two or more chemically bound atoms. Theories provide a deeper understanding of a law. Laws can be used to predict future observations. All of the above are true statements.

Explanation / Answer

Fe   = 26   1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6

Fe---------------> Fe^3+ + 3e^-

26e^-                23e^-

26P                   26P

Fe^3+ contains 23 electrons and 26 protons

22. d. laws can be used to predict future observations

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