Use the periodic table to answer the following questions.
what is the predicted order of first ionization energies from highest to lowest for beryllium, calcium, magnesium, and strontium?
a. be > ca > mg > sr
b . be > mg > ca > sr
c . ca > sr > be > mg
d. sr > ca > mg > be

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?