The Atom
Each atom contains protons and ________ in its nucleus.
neutrons
The periodic table contains all of the known ____________ on earth.
elements
the time it takes for half the atoms in an element to decay
half-life
a change in state of matter
physical
Water
neutral
The number above the element in the top left is the number of ________ the element contains.
protons
equal to 602 hexillion atoms of a substance
mole
a nucleus that gives of radiation is considered
radioactive
effervescence (bubbling)
chemical
vinegar
acid
In a __________ bond electrons are shared.
covalent
________-14 is an isotope used for determining the age of rocks.
Carbon
decay in which electromagnetic waves are released
gamma
color change
chemical
borax
base
the weakest types of atomic bonds are _________
metallic
Elements with more than 82 protons are more ________________.
radioactive
decay on which a particle similar to a Helium nucleus is emitted
alpha
chopping a piece of wood in half
physical
coffee
acid
Electrons are arranged in ___________ around the ________ of the atom.
shells
nucleus
the only element that contains no neutrons
Hydrogen
in beta decay this is released from the nucleus
electron
radioactive decay
nuclear
substance with a pH of 11
base