Atomic Structure chem Flashcards
relative mass and relative charge of N
1,0
relative mass and relative charge of P
1, +1
relative mass and relative charge of E
1/1840, -1
Whats done during nuclide notation?
Proton no and relative atomic mass swaps
What are the only 2 elemnts in period 1?
Hydrogen and Helium
What are physical properties definition?
an aspect of matter that can be onserved/measured without changing the chemical identity of the substance
Proton no. is the same thing as
atomic no.
what are chemical properties def?
refers to type of chemical reaction the substance udnergoes
what are chemical props depended on?
no. of valence shells
Duplet config means?
2 E in valence shell
how can chemical prop be observed?
can only be observed by changing the chemical identity of the substance
Octet config mean?
8 E in the valence shell
More electrons then protons means…
the atom has gained electrons. the atom is thus a negative ion, anion.
less electron than protons…
it means the atom has loss electrons and thus is a positive ion, cation
no. of valence shell determines what
- group the atom belongs to
- chemical prop of atom
what is the only thing neutrons contribute to?
mass of the atom
Group number is determined by? Period number is determined b?
- no. of valence electons
- no of shells
is H2 a metal or not?
non metal
Why do atoms form ions?
to attain noble gas config and have a complete valence shell
Metals ____ electons and non metals ____ electrons
- lose
- gain
what are some properties of istopes?
same chemical properties but changes to physical properties
What are isotopes?
Isotopes are atoms of the same element with the same number of protons and valence electrons but different number of neutrons
Mass number def?
mass of 1 atoms and is always a whole number
