(b) The 1 kilogram mass consisted of 900 g platinum and 100 g iridium.
What was the ratio of platinum atoms to iridium atoms in the alloy?
Relative atomic masses (Ar): Pt = 195 Ir = 192
Tick (✓) one box.
0.99 :1.00
8.86 :1.00
9.00 :1.00
9.14 :1.00

Element before carbon on the periodic table

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°