week 2 Flashcards
what is the chemical behaviour of an atom determined by a- no. protons b- no. neutrons c- no. and arrangement of electrons d- size of the atom
c
when atoms complete the outer shell of electrons they form what bond?
covalent
in a nitrogen atoms, 3 pairs of electrons are shared by 2 nitrogen atoms. what bond is this?
triple covalent
If a pair of electrons is unequally shared between 2 atoms, what bond occurs?
polar covalent
ions with a positive charge are called
cations
ionics bonds are formed by a- atoms sharing electrons b- electrons are completely transferred c- share the electron
b
the weakest bond between 2 or more atoms
hydrogen
is this a reaction of decomposition?
h2 + CL 2 = 2 HCL
yes
what reaction is this ?
A+B =AB
synthesis
inorganic compounds that are soluble and whose ions will conduct electrical current
electrolytes
the bond between sodium and chloride in the compound sodiumchloride is what bond?
ionic
identify cations a- Na b-Cl c- K d- Na & Cl d- Na & K
d
which one is an anion a-Na b-Cl c-K d-a&b e- a&c
b
which of the following indicate one containing only trace elements a-sulphur/Cl/O b- selenium/H/Ca c-boron/O/C d- silicon/florine/tin
d
when a needle is floating on the surface of a glass of water what is it called
surface tension