Which element is the most reactive?

sodium, nickel, carbon, or oxygen

10) Aluminum is a highly reactive metal that oxidizes when exposed to air. Which of these would be a good first step in balancing this reaction? Al + O2 → Al2O3

Some elementary particles are positively or negatively a. adverse particles. b. charged particles. c. fueled particles. d. progressive particles.

A 5.00g sample of a carbohydrate (compound containing carbon, hydrogen, and oxygen) is found to contain 2.006g carbon, 0.334g hydrogen, and 2.66g oxygen. What is the percent by mass of oxygen in the carbohydrate

Potassium decays by beta decay part of the nuclear equation is shown below. fill in the blank with a number 42 19 k - -> 0 - 1 e + 42? ca

Suppose that a 1.0-L reaction vessel initially contains 1.0 mol of O3 and 1.0 mol of O2. What fraction of the O3 will have reacted when the rate falls to one-half of its initial value?

4*C: 4cm 8*C: 10cm 12*C: 14cm 16*C: 18cm 20*C:24cm 24*C: 12cm what is the independent variable, dependent variable and three constant variables?

In the chemical laboratory, why do scientists use a mortar and pestle? a. to increase surface area of a solute b. to decrease surface area of a solute c. to increase temperature of a solute d. to decrease temperature of a solute

Is a mixture being separated into two elements a chemical change

Which electrons are lost by an atom of iron when it forms the Fe3 + ion? A. One s orbital electron and two d orbital electrons B. Two s orbital electrons and one d orbital electron C. Three s orbital electrons D. Three d orbital electrons

What does a three letter chemical symbol mean