Periodic Table Elements
This element, with the symbol O, is essential for respiration in living organisms.
Oxygen
A chemical reaction where something burns.
combustion
Bond formed by sharing electrons
covalent bond
The center of the atom is called the:
nucleus
The smallest unit of an element
atom
This element, the lightest noble gas, has the symbol He.
Helium
A reaction where two substances join to make one new substance.
Synthesis
Bond formed by transferring electrons
ionic bond
The negatively charged particle in an atom.
electron
The center of an atom
nucleus
This element, symbol Fe, is commonly found in steel and is vital for hemoglobin in the human body.
iron
A reaction where one substance breaks apart into two or more substances.
Decomposition
Attraction between opposite charges
electrostatic attraction
The positively charged particle in the nucleus.
proton
Particles with a positive charge
proton
This element, symbol Ag, has been used for centuries to make jewelry and coins.
silver
When an acid and a base react, they form water and this other substance.
salt
A molecule with uneven charge distribution
polar molecule
The particle with no charge in the nucleus.
neutron
This number identifies an element
atomic number
This element, symbol Rn, is a radioactive noble gas that is naturally occurring.
radon
This shows the substances that take part in a chemical reaction.
chemical equation
The force holding atoms together
chemical bond
The number of protons in an atom is called the:
atomic number
Atoms of the same element with different numbers of neutrons
isotopes