What particles make up the nucleus of an atom?
Protons
Neutrons
The rows in a periodic table are called.
Periods
Subatomic Particles
Particles with a positive charge in an atom are called what?
Protons
water (H2O)
How many total atoms are present in a molecule of water?
3 Total atoms
2 Hydrogen
1 Oxygen
What is the 8 in this image called and represent?
Atomic number-# of protons
What are the particles located outside the nucleus of an atom?
Electrons
What do the atoms in the same period tell us?
They all share the same # of levels (or shells-orbitals)
Particles with negative charge in an atom are called what?
Electrons
________ form when 2 or more atoms form chemical bonds to form a new substance.
Molecules
What is the O in this image called?
The symbol(atomic Symbol)
What type of particles in the atom determine the type of element (the atomic number)?
Protons
The columns in a periodic table are called...
Groups
Particles with no charge in an atom are called what?
Neutrons
________ form when 2 or more elements (different atoms) form chemical bonds to form a new substance.
Compounds
What is the word Oxygen in this image called?
The elements name.
What are the rings around the nucleus called?
Levels, orbitals or shells
What do the atoms in the same group tell us?
They all have the same number of valance electrons.
The charge of an atom with 8 protons, 8 neutrons, and 8 electrons.
0=neutral
The Periodic Table of the Elements
What two atoms are located in the first period?
Period #1
H and He
Hydrogen and Helium
What is the 15.99 in this image called and represent?
The atomic mass.
It equals the sum of the protons and nuetrons.
What is the center of an atom called?
The nucleus.
Who created the Periodic Table?
Dimitri Mendeleev
The EXACT charge of an atom with 8 Protons, 7 Neutrons, and 6 electrons. (Charge and #)
+2
What are valance electrons?
The electrons in the outermost shell of an atom.
How is the periodic table organized?
Increasing atomic #.