Atomic Structure Flashcards
In the P.T, what is a group?
A column (there are 8 columns)
Why do elements in the same group have similar chemical properties?
They have the same number of outer electrons
What is a period?
a row of elements
What groups are very reactive?
1+7
What are elements made up of?
atoms
Where are Protons and Neutrons found?
the nucleus of an atom
Where are electrons found?
in electron shells orbiting the nucleus
What is the atomic number used for?
to order the elements in the periodic table
What is the charge of a proton
+
What is the charge of an electron
-
Does a neutron have charge
no
What is the mass of a proton
1
What is the mass of an electron
0
what is the mass of a neutron
1
What holds the electrons in place
the positive nucleus