Which of these 2a elements has the largest atomic radius?
a. beryllium
b. magnesium
c. calcium
d. barium
e. radium

For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea

What is the polyatamic ion of borate

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?