Atomic Structure Flashcards
What does the Mass number tell you
Protons + neutrons
What is in the nucleus
Protons and neutrons
Number of protons is the same as
Number of electrons
What is the mass of a proton
1
What is the mass of a neutron
1
What is the mass of an electron
0
What is the charge on a proton
1
What is the charge on a neutron
0
What is the charge on an electron
-1
What does the Atomic number equal
Protons
Who proposed the plum pudding model of the atom
JJ Thompson
Who discovered the nuclear model
Rutherford
Who discovered the energy level model
Niels Bohr
Who discovered neutrons
James Chadwick
What does the group number on the periodic table tell you
The number of electrons in the outer shell
Sodium is in group 1, how many electrons are in its outer shell
1
Are the alkali metals more or less reactive than the transition metal
More reactive
What gas is released when the alkali metals react with water
Hydrogen
What is an endothermic reaction
Energy being taken in
