Chemistry Flashcards
(22 cards)
Reaction
elements combine or something, erica is fat
physical
physical, seeing or touching, color, texture, etc.
chemical
properties not observable, flammability, etc.
catalyst
something that speeds up a chemical reaction
change
8th grade theme, erica grow fatter, elements change
element
pure substance, all atoms have same number of protons
single bond
share 1 electron
double bond
share 2 electrons
formula
chemical formula, shows elements that combine or something
atomic mass
mass of an atom
metals
high electron conductivity, based on location in periodic table
non-metals
not metals
metalloids
transition metals, in between the metalloids and the non-metals (ladder)
atoms
smallest building block of matter
valence electrons
number of electrons in the outermost layer, determines bonding
electrons
negative charge orbiting in the electron shell/cloud
protons
positive charge in the nucleus, determine element
neutrons
no charge, in nucleus
electron shell/cloud
energy levels where electrons are found
orbitals
s, p. d, f
nucleus
middle of atom, holds protons/neutrons
subscript
tells how many atoms of an element there is
