Answer
a) halogen
b) noble gas
c) halogen
d) neither
e) noble gas
Work Step by Step
a) Cl is found in group 17 (halogens) on the periodic table
b) Kr is found in group 18 (noble gases) on the periodic table
c) F is found in group 17 (halogens) on the periodic table
d) Ga is found in group 13, which is neither a halogen nor a noble gas
e) He is found in group 18 (noble gases) on the periodic table
