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chapter 3 science

QuestionAnswer
what are the five properties of metal hardness, malleable, shiny, ductility, flammability
what are the 5 properties of nonmetals gas at room temp., dull, brittle, insulator, low density
nucleus the center core of an atom usually holding protons and neutrons.
proton small, uncharged particle in the nucleus of an atom
neutron small, uncharged particle in the atom of a nucleus
electron a tiny negative charge, high energy particles that move in the space outside the nucleus of an atom.
atomic number the number of protons in the nucleus
atomic mass unit (amu) a unit of measurement for the mass of particles in atoms.
VALENCE ELECTRON the electrons that are farthest away from the nucleus of an atom and involved in chemical reactions
electron dot diagram a representation of the number of valence electrons in a atom, using dots placed around the symbol.
atomic mass the average mass of one atom of an element
periodic table an arrangement of the elements in order of atomic number, in which elements with similar properties are grouped in columns
group/family elements in the same vertical column of the periodic table
periodic a horizontal row of the element in the periodic table
malleable a term used to describe material that can be pounded or rolled into shape
ductile a term used to describe a material that can be pulled into a long wire
conductor a substance though which electrons move freely transmitting, heat or electricity
magnetic a characteristic of those metals that are attracted to magnets and can be made into magnets.
corrosion the gradual wearing away of metal element due to chemical reaction
alkali metal an elements in group 1 of the periodic table
alkaline earth metal an element in group 2 of the periodic table.
transition metal an element in group 3 through 12 of the periodic table
lanthanide a group of elements in the first row of the rare earth elements on the periodic table
actinide a group of element in the 2nd row of the rare elements ion the periodic table
metalloid a element that has some of the characteristics of both metals and nonmetals
noble gas an element in group 18 of the periodic table
nonmetal an element that lacks most of the properties of metal
diatomic molecule a molecule composed of two atoms
halogen family the elements in group 17 of the periodic table
in the current periodic table it is rearranged by the atomic number
the particles that move around outside an atoms nucleus are electrons. true
Dmitri Mendeleev is credited with developing the first periodic table. true
the alkali metals include iron, copper, silver, and gold. false
NOBLE GASES USUALLY EXIST AS COMPUNDS. FALSE
list 5 different metals and give examples about how they are used. gold-jewelry aluminum- aluminum foil titanium- air plane propellers silver- jewelry copper- wires
list 5 different nonmetals and give and example of their uses chlorine- pool disinfectant hydrogen- chemical formula for water helium- balloons neon- Las Vegas signs iodine- purifying
why would you expect to find the element argon in it pure, uncombined form in nature its a gas
why can two different elements have very similar atomic masses similar amount of protons
would you expect elements A and B have similar chemical properties? WHY OR WHY NOT yes, they both are gases
which of the metals you identified is the most reactive? Lead, it is off color somewhat conducts electricity but not fully.
what is the atomic number for Zinc 30
how many electrons does a Zinc atom contain 30
in what group of the periodic table is Zinc located 12 group
in what period of the periodic table is Zinc located in 4th period
from their location in the periodic table, you know that Zinc and Cadmium are...... Transition Metals
Created by: chou1211
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