Structure of Atoms
positive charge and a mass of 1 (a.m.u.)
What is a proton?
make up most of the elements in the periodic table
what are metals?
formed when electrons are transferred from one atom to another
What is an ionic bond?
NaCl
what is sodium cloride?
reaction that takes place in the nucleus of an atom
what is a nuclear reaction?
has 24 protons and electrons
what is the element chromium (Cr)
found on the right side of the periodic table
what are non-metals?
formed between a metals and a non-metals
What is an ionic bond?
CaS
What is calcium sulfide?
a larger nucleus splits into two small nucleus and releases a lot of energy
What is fission?
found in Period 3, Group two
What is Magnesium?
the larger of the two numbers in the box for each element in the periodic
What is the atomic mass?
formed when two atoms share electrons
What is a covalent bond?
tri -
What is the prefix for 3
two smaller nuclei fuse into on larger nucleus with the release of a lot of energy
What is fusion?
its model has 4 energy levels and 7 electrons in its outer orbit
What is Bromine (Br)?
rows in the periodic table represent
What are Periods or energy levels?
two or more atoms bonded together
what is a compound?
CCl4
What is carbon tetrachloride
the time it take for half of a radioactive substance to decay
What is a radioactive half-life?
same # protons but different # electrons
What is an ion?
do not form ions or bond with other atoms
What are the Noble Gases?
the compound formed when Mg2+ bonds with Cl-
What is MgBr2
dinitrogen pentoxide
What is N2O5
the fraction of a radioactive substance that remains after two half-lives
What is 1/4?