All Elements Have at Least Two Naturally Occurring Isotopes

Q20: Which of the following properly represents the

Q21: Antimony is a metalloid containing 51 protons

Q22: Identify the element with the ground state

Q23: When two electrons occupy the same orbital

Q24: Protons and electrons reside in the nucleus

Q26: Which atom has the largest atomic radius?<br>A)K<br>B)Ga<br>C)Br<br>D)Rb

Q27: The electron cloud contains most of the

Q28: The element symbol for manganese is _.<br>A)M<br>B)Ma<br>C)Mg<br>D)Mn

Q29: The atomic weight of an element is

Q30: Helium is an s block element.