Periodic Table
developed the modern version of the periodic table
Who is Dmitri Mendeleev?
Hydrogen in C6H12O6
What is 12?
negative charge, smallest of the subatomic particles, located outside the nucleus
What is the electron?
symbols and numbers
What is a chemical formula?
atoms join and form a new substance
What is a chemical change?
11
Sodium
Na
22.98977. <---------
What is the atomic mass?
changes color when exposed to acid or base
What is an indicator?
smallest piece of an element that can be recognized as that element
What is an atom?
the study of matter - what it is made of, etc...
What is chemistry?
shares electrons
What is a covalent bond?
protons + neutrons
What is the atomic mass?
compound broken down
What is decomposition reaction?
The center of the atom.
What is the nucleus?
an atom that has gained or lost electrons
What is an ion?
developed a simplified model of the atom
Who is Neils Bohr?
number of protons in a neutral element with 37 electrons
What is 37?
finding the concentration of acids and bases
What is the pH scale?
located in the nucleus, largest subatomic particle, no charge
What is a neutron?
only one kind of atom in a substance
What is an element?
positive and negative attract
What is an ionic bond?
across and down on a periodic table
What is a period (across {horizontal} - how many shells {energy levels}) & group (up/down {vertical} - how many electron in the outer shell); also has similar physical and chemical properties?
dangerous acid is spilled
What is neutralize with a base?
located in the nucleus, positive charge, middle child
What is a proton?
number of protons
What is the atomic number?
a reaction between an acid and base produces which ionic compound
What is a salt?