states of matter
This state of matter has a definite volume but takes the shape of its container.
is a liquid?
This ancient Greek philosopher first proposed that matter is made of "atomos".
is Democritus
On the pH scale, this number represents a perfectly neutral substance.
is 7
This trend refers to the distance from the nucleus to the outer edge of the electron cloud.
is atomic radius
This is the chemical formula for water.
is H₂O
This is the process of a solid changing directly into a gas without becoming a liquid.
is sublimation
He developed the "Plum Pudding" model after discovering the electron. hint we learned this in Mr freemens class
is J.J. Thomson
Substances with a pH between 0 and 6 are classified as what
is an acid
This trend increases as you move from left to right across a period and up a group.
is electronegativity (or ionization energy)
This is the chemical formula for table salt (Sodium Chloride).
is NaCl
This state of matter consists of highly ionized gas found in stars and neon signs.
is plasma
His Gold Foil experiment proved that atoms are mostly empty space with a dense nucleus.
Ernest Rutherford
This type of organic compound, like litmus paper, changes color based on pH.
is a pH indicator
This is the energy required to remove an electron from a neutral atom.
is ionization energy
This formula represents Carbon Dioxide
is CO₂
This term describes a solid whose particles are arranged in a regular, repeating 3D pattern.
is a crystalline solid
He created the "Planetary Model," where electrons orbit the nucleus in fixed energy levels.
Niels Bohr
Because the pH scale is logarithmic, a pH of 4 is this many times more acidic than a pH of 5
is 10 times
This element has the highest electronegativity on the entire periodic table.
is Fluorine
This is the chemical formula for Hydrochloric Acid.
is HCl
This state change occurs when a gas loses energy and turns back into a liquid.
is condensation
He is considered the "Father of Modern Atomic Theory" for his 1803 postulates.
is John Dalton
These are the two products typically formed when an acid and a base neutralize each other.
are water and a salt
As you move down a group, atomic radius increases due to the addition of these.
are electron shells (or energy levels)
is C₆H₁₂O₆