Definitions
one of the three basic particles inside atoms; located in the nucleus; possesses positive charge and has a mass very close to the mass of a neutron
Protons
a chemically bonded cluster of atoms; the smallest particle in compounds formed by covalent bonding between nonmetals including hydrogen
molecules
A compound is made up of at least two different _____
elements
How many elements are in the following formula? 5H2O
name them
two
hydrogen & oxygen
list the basic information in each cell of the periodic table
chemical symbol, atomic number, element name, atomic mass
anything that has mass and takes up space (volume)
matter
how many naturally occurring elements are there?
94
When atoms share electrons, what kind of bond is that called? (think of the pipe cleaners and pony beads)
covalent
How many atoms are in the following formula?
B2(NO3)3
14
They are called "synthetic". There are 25.
one of the three fundamental particles inside atoms; located in orbitals by energy around the nucleus; possesses negative charge
electrons
one of the three basic particles inside atoms; located in the nucleus; possesses no electric charge
neutron
What did the bumps on Legos represent?
How many elements are in the following formula?
Li2SO3
3
Draw an atom and label the following: atoms, protons, neutrons, nucleus, empty space
see drawing
the smallest part of an element, composed of a nucleus of protons and neutrons surrounded by a cloud of electrons located in orbitals according to their energies
atoms
two or more different elements chemically bonded together.
compounds
what part of an atom joins atoms together
electrons
when atoms give and take electrons, the bond is called
ionic
why is Mendelev celebrated on the periodic table of elements?
He could tell by the patterns that God made what types of elements had not yet been discovered.