chemistry atomic structure

katie Dack
Flashcards by katie Dack, updated more than 1 year ago
katie Dack
Created by katie Dack over 5 years ago
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about the reactivity of metals as well as electron configuration, ions and isoptops

Resource summary

Question Answer
what are isotopes? isotopes are atoms of the same element with a different atomic mass. eg
what is the atomic number? the atomic number of an element refers to the number of protons in each of its atoms.
what is the charge of and mass of and electron? an electron has a charge of -1 and a mass of 0.0005
what is a atomic mass? the atomic mass number of an element refers to the number of the protons + the number of neutrons in each of its atoms
what is the charge and mass of a neutron? the neutron has no charge but does have a mass of one.
what is the charge and mass of protons? a proton has a charge of +1 & a mass of 1
how are the elements arranged in the periodic table? Elements in the periodic table are arranged in order of atomic number.
on the periodic table were is the line between the elements that are metal and those that are non-metal?
how many metals are in period 3?
what do electrons do? they orbit the nucleus of atoms
how are electrons arranged in a electron configuration? electrons are arranged in shells or energy levels. eg
what are the rules for electron configuration shells? 1. maximum of 2 electrons in first shell 2. maximum of 8 electrons in second shell 3. maximum of 8 electrons in third shell 4. fill up electrons from the first shell outwards.
DRAW the calcium electron configuration.
now WRITE the written configuration for calcium. 2.8.8.2
what does the group number and period number show in a electron configuration? the group number shows the number of electrons in outer shell and the period number shows the number of electron shells in use.
how are elements arranged in the periodic table? by atomic number.
define what an ion is? an ion is an draw electron configuration of ions.
what are ions and how are they formed ions are charged atoms. They are formed by atoms gaining or losing electrons
DRAW the sodium ion configuration.
how are the group numbers linked to ion charge (in positive +)? group 1 = li+, Na+, K+ group 2 = B2+, Ca2+, Mg2+ group 3 = B3+, Al3+
how are the group numbers linked to ion charge (in negative -)? group 5= N3-, P3- group 6 = 02-, S2- group 7 = F -, Cl -
why is group 0/8 special? because they already have a full outer shell, so they don't need to gain or lose electrons and they are very reactive.
what is ionic bonding (draw)?
state the fundamental particles found in a nucleus. neutrons and protons.
state the fundamental particle found in shells around the nucleus. electrons
why are atoms neutral. atoms are neutral because they balance out the number of protons and electrons. protons of positive, electrons negative.
why are electrons not included in the mass number? the mass number is so small we ignore it (negliable)
Describe the similarities between oxygen-18 and oxygen-16. the similarities are: 1. they have the same P+E 2. need 2 electrons to form ion 3. same e in outer shell 4. same atomic number 5. same group/period
Describe the differences between oxygen-18 and oxygen-16. the differences are: 1. Number of neutrons (8v10) 2. atomic mass
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