Explain what monatomic ion Potassium will form with Fluorine.

A radioactive element of mass 20.0g was isolated and stored. It was discovered after 40days that 2.5g of the element remained undecayed. Calculate the half life of the element.

Which of the following compounds are nonelectrolyte? A) sodium bromide B) magnesium sulfate C) carbon tetrachloride D) calcium hydroxide

Similarities between isotopes and isotopies

The strongest light left over from the big bang is called background radiation and was given off as which type of wave? A. Radio waves B. Visible light C. Microwaves D. Gamma rays

About how old is the sun? 1.2 billion years 4.6 billion years 6.4 billion years 8.2 billion years

How long does it tae for bleach to evaprate?

What product (s) forms at the cathode in the electrolysis of an aqueous solution of k2so4?

What element is used as a shield to protect people from radioactive substances?

The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region? A. gamma rays B. visible light C. microwaves D. radio waves E. x-rays

A farmer uses water to irrigate his potato crops. Which roles of water does this examplify