Describe and explain the trend in atomic radius as atomic number
increases across a period from alkali metal to noble gas.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?

Which diagram represents the phase tha occurs after a solid melts?