30. How many electrons do isotope Fe-53, if it has 26 protons and the iotope is neutral?
a. 25
b. 26
c. 27
d. 28
31. Group I elements belong to this family:
a. noble gases
b. halogens
c. inner transition metals
d. alkali metals
32. Which of the following is a noble gas?
a. argon (Ar)
b. oxygen (O)
c. carbon (C)
d. hydrogen (H)
a. 25
b. 26
c. 27
d. 28
31. Group I elements belong to this family:
a. noble gases
b. halogens
c. inner transition metals
d. alkali metals
32. Which of the following is a noble gas?
a. argon (Ar)
b. oxygen (O)
c. carbon (C)
d. hydrogen (H)
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Answer:
Explanation:
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Answer:
30.B
31. D.
32. A.
Explanation:
the exlplanation for number 30 nasa pic
Alkali Metals: Group 1 (IA) - 1 valence electron. Alkaline Earth Metals: Group 2 (IIA) - 2 valence electrons.
noble gases or inert gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). The name comes from the fact that