Periodic Table Flashcards
The elements in the periodic table increase by ___________ ____________ as you move from left to right across the table.
Atomic number
The atomic number tells how many ____________ are in an atom of each element.
Protons
Positively charged particle in the nucleus of an atom…
Proton
Neutrally charged sub atomic particle in the nucleus…
Neutron
Negatively charged sub atomic particle that spins very fast around the nucleus of an atom…
Electron
The vertical rows of elements on the periodic table are numbered 1-18 and are called…
Families or groups
Elements in the same family or group share common ______________.
Characteristics or properties. Also, they share the same number of valence electrons.
The family of elements that is in group 18 (the last column on the right.) They do not react with other elements (inert) because they have all 8 of their valence electrons. He, Ne, Ar, Kr
Noble gases
The family of elements that make up group 17. They are very reactive because they have 7 valence electrons and need one more to be stable.
Halogens
The family of elements that are on the zigzag to the right of the periodic table. They have some properties of metals and some properties of non metals.
Metalloids
The family of elements that make up most of the periodic table. Most of them are good conductors of heat and electricity. They have a shiny luster, are solid, ductile (can be stretched into wire), malleable (can be pounded into shape).
Metals
The family of elements that are on the right side of the periodic table and lack the properties of metals. Many of these are gases at room temperature. Dull, brittle, poor conductors of heat and electricity.
Nonmetals
