An atom with the electron configuration of 182281 will lose one electron(s) and become isoelectronic with the noble gas
helium.
TRUE
FALSE

What happens to the atomic radius when an elctron is lost

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h