The atom
Where are neutrons, protons, and electrons found.
Neutrons and Protons in the nucleus
Electrons in the electron cloud around the nucleus
On the test can we put atomic mass or do we need to use average atomic mass
average atomic mass
What charge does an ion have if the atom loses an electron
positive
What types of atoms are involved in metallic bonds
2 metal atoms
What are the charges and weights for each type of atomic particle.
Neutron: neutral, 1 u
Proton: Positive, 1 u
Electron: Negative, 0 u
The periodic table is organized by increasing what
atomic number
How many valence electrons does group 18 have
a full outer shell
2 for Helium 8 for all other elements
What type of bond fits the description of opposites attract
Who was the first scientist to work on the atomic theory.
John Dalton
Where are metals, nonmetals, and metalloids located on the periodic table
metals to the left of the zig zag line
nonmetals to the right of the zig zag line
metalloids boarder the zig zag line.
How many valence electrons does Nitrogen have if it has an Atomic number of 7 * hint draw a bohr model of the atom.
5
How are metallic bonds formed
Metal atoms lose electrons and then are held together by the floating around electrons
What are the atomic mass and atomic number for a sodium atom with 11 protons, 12 neutrons, and 11 electrons.
Atomic Mass: 23 u
Atomic number: 11
What are the 4 things a tile on the periodic table show us
Atomic number
Chemical Symbol
Chemical Name
Average atomic mass
During a chemical change what happens to atoms
they are rearranged
Covalent bonds are formed how
Atoms share 1 or more electrons with each other
How has the atomic theory changed over time
We went from thinking an atom is a solid sphere, to adding the particles of electrons, neutrons, and protons. Where we now know that the atom has a nucleus of neutrons and protons surrounded by the electron cloud
Who first created the periodic table
Mendeleev
What are the three models used to show an atom, and why might we use each one
electron cloud model: Shows us where each part is located
Bohr model: Shows us how many valence electrons we have
Space-filling model: Shows how atoms connect to eachother
How do bonds form in ionic bonds
two oppositely charged ions have a force that brings them together