Vocab
The smallest particle of an element that can exist alone.
Atom
CO2
Carbon Dioxide
A form of mass that has a definite Volume but no definite shape is called a:
liquid
This element expands when it gets colder
water
H represents what element on the Periodic Table
Hydrogen
Two or more atoms chemically combined
molecule
The temperature scale with 0 at freezing and 100 at boiling
Celsius
1. Definite Shape
2. Definite Volume
This man drew the first picture of an atom
Neils Bohr
How are elements organized and arranged on the periodic table
by their atomic number
A union of elements
Made of crystals.
Crystalline
True or False: Density is the amount of mass per unit volume.
True
Which of these is an example of a compound:
A. Salt B. Calcium C. Oxygen
A. Salt
This man discovered the Periodic Table
Dmitri Mendeleev
Composed of two or more metals melted together.
Alloy
The tendency of a body to float in a fluid.
Buoyancy
The atomic mass is the measure of what:
Protons plus neutrons
Ability to react with another substance
Chemical Property
What is the total number of atoms in this formula: CaCO3
5
The combining power of an atom.
Valance
Shapeless. Lacking complex organization
Amorphous
How many elements does the Periodic Table Show? (HINT: it is over 100)
103
What is the greatest number of electrons that can be found in the second shell of an atom, this shell is called the L shell
8
What is the only metal on the periodic table that is a liquid at normal room temperature? (HINT: think about temperature)
Mercury