Name the three types of particle in an oxygen atom.
protons, neutrons, electrons
neutrons, oxygen, nucleus
electrons, nucleus, oxygen
State the relative mass and charge of an electron
mass = 1/200, charge negative
mass =1/2000, charge positive
mass = 1/2000, charge negative
The element boron has 5 protons. How many electrons does a boron atom have in its outer shell?
1
2
3
4
Is it the number of protons or the number of neutrons that defines each element?
protons
neutrons
What does the mass number represent?
the number of protons in the atom
the total number of protons and neutrons in the atom
the number of protons and electrons in the atom
what does the atomic number represent?
the number of protons in the atom , (the same as electrons)
the number of neutrons and electrons
the total number of protons, neutrons and electrons
Which is the correct definition of the term isotope?
Isotopes are: different atomic forms of the same element, which have the SAME number of electrons but DIFFERENT number of protons
Isotopes are: different atomic forms of the same element, which have the SAME number of protons but DIFFERENT numbers of electrons
Isotopes are: different atomic forms of the same element, which have the SAME number of protons but DIFFERENT numbers of neutrons
