Element Symbols
This element has the symbol H.
Hydrogen
This is the number of protons in an atom.
atomic number
These elements are shiny and good conductors of heat and electricity.
Metals
This particle has a positive charge.
proton
This element has atomic number 6 and is found in all living things.
Carbon
The symbol O stands for what element.
Oxygen
Rows on the periodic table are called this.
periods
These elements are usually dull and poor conductors.
nonmetals
This particle has no charge.
neutron
This element is the lightest noble gas.
Helium
This element’s symbol is Fe
Iron
Columns on the periodic table are called this.
groups
These elements separate metals and nonmetals on the periodic table.
metalloids
This particle has a negative charge
electron
This element is a metalloid with the symbol Si and is used in computer chips
Silicon
The symbol Na stands for this soft metal.
Sodium
This is the center of an atom where protons and neutrons are found.
nucleus
Elements in this group react strongly with water.
alkali metals
Protons and neutrons together make up this number.
Atomic mass
This element has 17 protons and is a reactive halogen gas.
Chlorine
This element has the symbol Au
Gold
These tiny particles move around the nucleus.
electrons
These elements rarely react with other elements.
noble gases
This tells how many electrons are in the outer shell.
valence electrons
This element is an alkali metal in Period 4.
Potassium