The most active of all the chemical elements is a halogen known as

A. astatine.

B. bromine.

C. fluorine.

D. iodine

What is caliper used for

What are three differences between potassium 40 and carbon 14?

In what order did mendeleev arrange the elements in his periodic table?

A geology student found an irregularly shaped rock, with a mass of 28.63 grams, and placed it into a graduated cylinder with a volume of 13.31 mL water. If the water level increased to 19.

The definition of chemical symbol

Which would exhibit characteristics of both a metal and a nonmetal? select one: a. si b. ge c. sb d. po e. all of the above exhibit characteristics of both a metal and a nonmetal?

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.

Which of the following is the most likeley example of an favorable mutation A. A mutation that makes a rabbit able run faster B. A mutation that changes the rabbit's fur to bright orange C. A mutation that changes the color of the rabbit's eyes D.

Which of these mole ratios is possible for this reaction? FeCl3 + 3NaOH → Fe (OH) 3 + 3NaCl 1:1 1:3 3:1 2:3

The chemical equation for reduction of phosphorite Ca3 (PO4) 2