10-19-15 Flashcards
protons charge
positive +
neutrons location
nucleus
neutrons charge
neutral
electrons location
around the nucleus
electrons charge
negative -
Is the nucleus of an atom positive, negative, or neutral?
positive and neutral
Is the atoms overall charge positive, negative or neutral?
neutral
Why do atoms have an overall neutral charge?
protons and electrons zero each other out
according to the MAT, the exact location of an __________ is uncertain.
electron
the region where there is a probability of finding electrons
electron cloud
who first created the periodic table of elements
Mendeleev
how were the first elements arranged
by increasing atomic number
what is a period
row of elements
what is a group/family
elements in a column with similar properties
what is an isotope
ionized atom
elements in the same group have the same ___________.
valence shell count
what is a valence electron
outermost electrons on diagram
the general trend of valence electrons going across the table left to right
valence electrons increase
metal characteristics
conductive, malleable, shiny
where are metals located on the table
left of the staircase
1-13
nonmetal characteristics
low boiling point, gasses, vary in chemical and physical properties
where are nonmetals located (generally)
14-17
right of staircase
what is a metalloid
elements that have characteristics of both metals and nonmetals
metalloid elements
BAGS
boron, arsenic, germanium, silicon
