The mass number of a chromium atom is 52 and it has 24 protons. how many neutrons does this atom have?
1. 24
2. 28
3. 76
4. 80

One of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description?

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.