If the atomic number is 3 and the mass number is 7 what is the number of protons

What does the x represent on a motion map

If an element has 14 electrons how many protons are present in the atom?

What is not a factor in soil type? A. Mineral Content B. Pollution C. Climate D. Microorganism Content

What are Storm clouds? how are they different from other types of clouds?

The pressure of a sample of gas of constant volume is 2.0 atm at 30.ºC. What is the pressure of this sample at 20.ºC?

For the reaction represented by the equation 2na + cl2® 2nacl, how many grams of chlorine gas are required to react completely with 2.00 mol of sodium?

Transuranium elements are elements larger than uranium that are produced via transmutation. a. True b. False

Explain why glacial deposits have been found in Africa?

Which of the following would result in butyl phenyl ether as the major product? a. Reaction of phenoxide with 1-bromobutane b. Reaction of 1-butanol with bromobenzene c. Reaction of phenyl magnesium bromide with 1-butanol d.

A 200-gram sample of a radioactive nuclide is left to decay for 60 hours. At the end of 60 hours, only 25 grams of the sample is left. What is the half-life of the nuclide sample? 60 hours 30 hours 40 hours 20 hours - - - > I think 20?