chemistry Flashcards
what are atoms?
basic unit of chemical element
- a source of nuclear energy
what are ions?
a charged atom or molecule
what are isotopes?
atoms thathave the same number of protons and elcetrons but different numbes of neutrons
what is the difference between metals and non metals?
-metals tend to be more shiny and solid at room temperature
-nonmetals are dull and o not reflect light, their states at room temperature vary
what are families and groups in the periodic table?
they are the vertical parts of the periodic table
what are the name of the groups?
-alkali metals
- alkaline earth metals
-halogens
-noble gases
what are periods in the periodic table
they are the horizontal rows
what are ionic compounds?
contains two metals or one gas and one solid
ex. any solids, any thing in polyatomic ions
what are molecular compounds?
contains two or more no metals
ex. any gases
what is a binary compound?
a molecular compound that is composed of two elements.
what is a multivalent compund?
most transition metals and some metals in group 4
what is a polyatomic?
a chemical element that naturally exists as a compound molecule containing more than three atoms of the same element.
