Periodic Table
What element has 1 proton and 1 electron on the periodic table?
Hydrogen
This element has a positive charge.
proton
this is the center of the atom
nucleus
this subatomic particle orbits the nucleus and has a negative charge
electron
this is the building block of all matter
atom
Why are noble gases special?
They are very stable, because they have a full electron shell.
Where are protons found?
nucleus
the nucleus has these subatomic particles in it
protons and neutrons
how many electrons can be in the first electron shell
2
2 or more atoms bonded together
molecule
What are the vertical rows of the periodic table called?
Groups
what tells us how many protons are in the nucleus?
atomic number
the mass of the nucleus can be found as the
atomic mass
how many electrons can be in the second electron shell?
8
Atoms normally have a ___________ charge
neutral
What are the horizontal rows of periodic table called?
periods
Adding this subatomic particle to an atom changes the element?
protons
neutrons have a neutral charge and protons have a positive charge. That gives the nucleus what type of charge?
positive
how many electrons can be in the 3rd electron shell
18
raw material made of only one kind of atom is
element
Who constructed the first periodic table?
Dmitri Mendeleev
The atomic mass is the mass of the neutrons and this subatomic particle
protons
The Nucleus is found where in the atom
center
electrons are small and fast and move around the nucleus in the what?
Electron cloud
An atom with a charge is an
ion