Periodic Trends Flashcards
Alkali is it a metal?
yes, metal on the left side of the table
Describe an alkali metal
how many valence electrons?
one valence electron
Readily (easily) loses electron
Very reactive
Halogens, metals or nonmetals?
Nonmetala
Halogens
how many valence electrons
7 valence electrons
Readily gain/take electrons
Very reactive
Period
Row
Group/family
Columns (similar properties)
describe a metal
Solid, shiny
Are metals conductors?
Conducts:electricity & heat
Describe a metalloid
Superconductors (silicon-phones)
Describe a nonmetal
Gases, dull
Are non metals conductors?
Nonconductors: electricity/heat
why is it solid to gas on the periodic table?
Metals= bigger, electrons are closer to one another Nonmetals= gas, electrons are farther away from each other
why form an ion?
to fill the outer ring, which stabilizes it, requires less energy to be totally filled
closer to the nucleus- less energy
why form bonds?
requires less energy to be bonded
what are bonds? what do they create?
Sharing or stealing of electrons when orbitals overlap
this creates compounds (compounds can be molecules or crystals)
made or broken in chemical reactions
evidence of a chemical reaction
color change Precipitate (liquids to solids, has to liquid) Odor Light Heat/cold Fire Sound Bubbles
what if the energy isn’t favorable to form a compound?
Just a physical change
what do physical changes create? Chemical?
Physical-mixtures
Chemical-compounds
do bonds occur in chemical or physical reactions?
Chemical
Properties of a chemical vs physical reaction
Chemical- totally new properties from its element
Physical- has similar properties to its component
Examples of a chemical reaction
Sodium chloride, NaCl- salt
nothing like salt
Examples of physical reaction
Salt water, lemonade
