Charges
Nucleus consists of ____+_____.
Protons +neutrons
What is the charge on an electron?
minus 1 charge
This number equals the number of protons.
What is atomic number?
This is another name for the group 1 atoms.
Alkali metals
Greek philosopher who came up with the idea of an atom.
Democritus
What is a cation?
Positive charge
How many electrons are in the nucleus of a stable atom with the atomic number of 20?
0 electrons
What element symbol "K" represents in the periodic table?
What is atomic number of K?
Potassium
19
What group is Argon in?
What is group 8
What is the strongest type of radiation, alpha, beta, or gamma?
Gamma
An ion with a negative charge is called
What is Anion
Which of the three sub-atomic particles is the lightest? ...
electron
Define isotope
What is the same element with different numbers of neutrons
Define group (up and down OR left to right)
What is the columns on the periodic table that groups multiple elements
Mass number is
number of protons +Neutrons
What is the charge of an electron?
Negative 1
Where are the electrons inside an atom?
Electron cloud
An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
What is an ion?
This group is very unreactive.
This man helped to develop and popularize the periodic table.
Mendeleev
What is the charge on proton?
Plus 1 charge
What is the centre of an atom called?
Nucleus
What is charge on neutron?
Zero
Neutral
This element is in period 3 group 2.
Magnesium
Define M.A.N.
Mass # - Atomic # = Neutron #