A.Negatively charged B.Orbit the nucleus C.Positively charged D.1/2000 amu
2.Electrons are
A.Orbit the nucleus and negative charged B.Are positively charged and make up the nucleus C.Take up most of the mass in the atom D.Are the same as the atomic number
3.The nucleus
A.Is made up of protons and neutrons B.Orbits the center proton C.Is the coldest point in the atom D.Surrounds the atom
4.The atomic number
A.Tells what can and what cannot move in an atom B.Orbits the center proton C.States how many spoolas are in the nucleus D.Is the same as the amount of protons
5.AMU stands for
A.Absolute Mass Unit B.Atomic Mass Unit C.Atomic Mass Unit D.Abraham's Mass Unit
6.If the atomic number is 9,the number of proton is
A.8 B.9 C.1 D.12
7.If Uranium's atomic number is 92 and it has 10 neutrons,how many protons does it have?
A.96 B.82 C.86 D.102
8.If Aluminum has an atomic number of 13 and has 14 protons,what is its mass?
13.According to atomic Theory,electrons are usually found:
A.In the atomic nucleus B.Outside the nucleus,yet very near it because they are attracted to the protons C.Outside the nucleus and often far from it-most of an atom's volume is its electron cloud D.Either in the nucleus or around it-electrons are readily found
14.___________said that everything in the universe is made up of tiny particles called atom
A.Democritus B.Dalton C.Copernicus D.Moseley
15.What are isotopes?
A.They havr the same number of neutrons but different number of proton B.They have different number of neutrons anf protons but the same number of electrons C.They have different number of neutrons and electrons but the same number of protons D.They have different number of neutrons but the same number of protons
