Ch5 Atoms and Isotopes Flashcards
Atoms
_ type of _
the smallest part of an _
the _ properties of an element
very _ and _
basic, particles
element
chemical
light, tiny
Element
contains only _ kind of atom
Diff kinds of _ in diff elements
Diff _ in diff elements (big/small)
1
atom
properties
Symbol
Represent _ of the elements
_ to _ letters max
names
1, 2
Structure of atoms _ _
p _ ( carries positive charge)
n _ (carries negative charge)
e-_ (carries no charge)
subatomic particles
protons
electrons
neutrons
Proton relative mass is _
Electron relative mass is _
Neutron relative mass is _
1
almost 0
1
Which atom doesn’t contain neutrons?
Hydrogen
Atomic number
no. on periodic table
number of _
protons
Mass number
no. of _ + _
_ are too light (not counted)
protons + neutrons
electrons
Atomic symbol
Shows atom _ , _ no., _ no.
symbol, mass, atomic
Atomic symbol of Carbon?
12
C
6
Isotope
Isotopes are _ _ of the _ _, with _ number of _ but _ numbers of _
Isotopes are different atoms of the same element, with the same number of protons, but different number of electrons
Isotopes
Same _ properties (same no. of protons and electrons)
Diff _ properties (diff no. of neutrons)
chemical
physical
Relative abundance of isotopes (%)
Usually one is more abundant
_ of isotopes of an elemnt in nature
proportion
Atomic mass unit?
6.02*10^23
Relative isotopic mass
almost equals to _ _ / _ mass
has no _
mass unit, atomic mass
unit
Relative atomic mass
one for each _
_ average of _ _ masses of isotopes
Has no _
element
weighted, relative isotopic
unit
isotopic mass of
2
H
1
2
Relative atomic mass = _ no.*relative _ + (same with diff isotope)
mass, abundance
Electrons move in diff _ _
electron shells
inner- _ shell
2nd shell
3rd shell
……….
outer- _ shell
1st, outer
How to cal max n. of electrons on each shell?
2(shell no.)^2
Electronic arrangement
no. of _ on each _
electrons, shell
Potassium electronic arrangement?
2,8,8,1 (last moved to 3rd)
Calcium electronic arrangement?
2,8,8,2 (last 2 moved to 3rd)
