August
liquid, solid, gas
what is a trace element?
elements crucial for life, despite being present in small elements
what is binary ionic compound
compound consisting of 1 metal and 1 nonmetal
scientific notation?
Notation expressing a number as a product of a number between 1.00 & 9.99 & the appropriate powers of 10
(6.83 x 1021km)(1.42 x 1018 km)
9.70 x 1039km2
physical property?
a characteristic of a substance that can change without substance becoming a different substance
what is a valence electron?
the outermost shell of an atom containing the valence electrons.
what is cation
atom of an element that loses VE
convert 12300000000000000000000000000000000000000000000000000000000000000000000000000000000 das in scientific notation
1.23 x 1082das
(7.95 x 10-16mL)(8.68 x 10-19mL)
6.90 x 10-34mL2
physical change?
change which does not affect a substances composition
how do you calculate # neutrons in an atom?
you round the atomic mass and subtract it by the atomic number
what is anion?
atom of an element that gains VE
what are sigfigs
# recorded in measurement
(4.974 x 108hg)/(2.523 x 104hg)
1.97 x 104hg
compound?
substance composed of a given combination of elements that can be broken down into those elements by chemical methods
what is element name for Db?
dubnium
what is a type 1 BIC
metal forms 1 cation
how many sig figs are in 0.000070030ds
there are 5sf
(9.09 x 1012hs)+(5.60 z 1013hs)
6.51 x 1013hs
what is electron shell?
electron shell may be thought of as an orbit followed by electrons around an atom's nucleus
name ALL periodic table elements except for one
helium- oganesson
What is an Ion?
A changed atom
when's christians birthday?
November 23, 2006
(2.983 x 10-18kL)-(8.756 x 10-19kL)
2.107 x 10-18kL