Atomic structure Flashcards
What is a Proton?
Positive
What is a Neutron?
Neutral
What is an Electron?
Negative
What is inside the Nucleus?
Protons and Neutrons
Which particle circles around the outside of the atom?
Electrons
What is atomic number the same as?
Proton Number
What’s an Isotope?
Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons.
Charge of a proton
+1
Mass of a proton
1
Mass of an electron
1/2000
What does the proton number/atomic number tell us?
Number of protons
What does the nucleon number/atomic mass tell us?
The total number of protons and neutrons.
Lithium: protons, neutrons and electrons
3 protons, 3 electrons, 4 neutrons
How many outer electrons does an element from group 7 have?
7
Charge of an electron
-1