The elements of the periodic table are arranged in horizontal rows according to each successive element's greater ... ?

1. atomic mass

2. atomic radius

3. number of protons

4. number of neutrons

Why doesn't water change into ice at 10 degree Celsius? A The fusion of water is an endothermic change but at this temperature, the temperature entropy product outweighs the change in enthalpy. B.

Show that the pH of a solution is - 0.301 when its hydronium ion concentration equals 2 moles/L. Is the solution acidic or basic?

The average atomic mass of ga is 69.72 amu. Calculate the abundance of each isotope.

Which of the following represents a double replacement reaction

1. Which of the following is a physical property? magnetism flammability reactivity 2. Matter that has definite shape and definite volume is a: solid liquid gas plasma toxicity 3.

Question 6 if a gas pressure gauge reads 32.0 psi, what is the pressure in inches of mercury? 165 in. hg 15.7 in. hg 65.1 in. hg 32.0 in. hg 6.19 in. hg

A line in the Brackett series of hydrogen has a wavelength of 1945 nm. From what state did the electron originate?

Convert 4.5 hours to seconds

Gasoline catches on fire is it flammability?

Enzymes are proteins that speed up chemical reactions in the body how do they work A. they increase the surface area of reactants B. they increase the concentration of reactants C. they decrease the concentration of products D. They act as reactants