science

noble gases

Noble gases are a group of chemical elements that are characterized by their lack of reactivity due to having a complete valence electron shell. This group includes helium, neon, argon, krypton, xenon, and radon. located far right on column 18

alkali metals

group one, very reactive, 1 valence electron and tend to lose it when forming ions (f, cl, li)

halogens

next to noble gases (17) they are very reactive non metals and have 7 valence

alkaline earth metals

reactive metals, 2 valence, on the left next to alkali metals (2) (mg, ca, be)

metalloids

located along the zigzag, have the properties of nonmetals and metals often semiconductors (si, b, te)

transition metals

located in the middle (rows 3-12) good conductors of heat and electricity, malleable and strong usually have a shiny colour

non metals

located to the right of the staircase, poor conductors mainly gases, solid non metals are often brittle

what is an ion and why do elements make them?

an ion is an atom that has lost or gained an electron, this happens to create a more stable valence (8)

what is a physical property?

is somthing you can oberve or measure without changing the chemical make up ig. state, malleability

what is a chemical property?

describes how a substance reacts ig. colour change, flammability, solubility.

what is an element

made up of only one kind of atom

what is a compound?

two or more elements chemically bonded, such as water

what is a mixture?

its two or more substances physically combined

what is ionic

its a transfer of electrons between a metal and a nonmetal

what is covalent

a chemical link between two nonmetals (share one or more valence electrons) to achieve a stable valence

what is a pure substance

matter made up of only one kind of particle

what is a heterogenous mixture

a mixture in which different parts are visible

what is a homogeneous mixture

a mixture that looks the same throughout

what is a solution

a homogeneous mixture of a substance in a liquid

what is a suspension

a cloudy liquid mixture in which particles mat be seen

elements in the same row have the same _____

amount of eletron shells

elements in the same column have the same_____

number of valence electrons