Atoms and elements
The subatomic particle in an atom that is always the same value as its atomic number
Proton
Chemical name for CaCl2
Calcium chloride
The three states of matter
Solid, liquid, gas
Rows in the periodic table
Periods
If an atom has 9 electrons, how many energy levels are occupied?
The only element that has 0 neutrons
A compound that forms when a metal atom gives electrons to two non-metal atoms
Ionic compound
Milk would be classified as this type of mixture
Homogeneous
The least reactive group of elements
Noble gases
The maximum number of electrons we can add to each energy level in order:
2, 8, 8, 2
An element with 15 protons and 16 neutrons
Phosphorus
Chemical name for P3N5
triphosphorus pentanitride
The ability of a substance to be shaped into a wire
Ductility
The most reactive group of metals
Alkali metals
Elements that share properties of metals and non-metals
metalloids
Two elements that have the same number of protons and a different number of neutrons
Isotopes
The definition of a molecular compound:
two or more non-metals sharing valence electrons
The ability of a substance to resist flow / movement
Viscosity
What do other elements do to become more stable like the noble gases are?
gain or lose electrons to achieve a full outer valence shell
Number of protons, neutrons, and electrons in a beryllium +2 ion
4 protons, 5 neutrons, 2 electrons
Which element is more reactive, lithium or rubidium?
rubidium
Two differences between ionic compounds and molecular compounds
Metal+non-metal vs non-metal+non-metal, giving electrons vs sharing electrons, differences in naming
Three properties of ionic compounds
Solid, soluble, good conductors