Karteikarten
chemistry atomic structure
Karten in diesem Stapel (29)
- 1what are isotopes?isotopes are atoms of the same element with a different atomic mass. eg
- 2what is the atomic number?the atomic number of an element refers to the number of protons in each of its atoms.
- 3what is the charge of and mass of and electron?an electron has a charge of -1 and a mass of 0.0005
- 4what 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
- 5what is the charge and mass of a neutron?the neutron has no charge but does have a mass of one.
- 6what is the charge and mass of protons?a proton has a charge of +1 & a mass of 1
- 7how are the elements arranged in the periodic table?Elements in the periodic table are arranged in order of atomic number.
- 8on the periodic table were is the line between the elements that are metal and those that are non-metal?
- 9how many metals are in period 3?
- 10what do electrons do?they orbit the nucleus of atoms
- 11how are electrons arranged in a electron configuration?electrons are arranged in shells or energy levels. eg
- 12what 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. - 13DRAW the calcium electron configuration.
- 14now WRITE the written configuration for calcium.2.8.8.2
- 15what 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.
- 16how are elements arranged in the periodic table?by atomic number.
- 17define what an ion is?an ion is an draw electron configuration of ions.
- 18what are ions and how are they formedions are charged atoms. They are formed by atoms gaining or losing electrons
- 19DRAW the sodium ion configuration.
- 20how are the group numbers linked to ion charge (in positive +)?group 1 = li+, Na+, K+
group 2 = B2+, Ca2+, Mg2+
group 3 = B3+, Al3+ - 21how are the group numbers linked to ion charge (in negative -)?group 5= N3-, P3-
group 6 = 02-, S2-
group 7 = F -, Cl - - 22why 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.
- 23what is ionic bonding (draw)?
- 24state the fundamental particles found in a nucleus.neutrons and protons.
- 25state the fundamental particle found in shells around the nucleus.electrons
- 26why are atoms neutral.atoms are neutral because they balance out the number of protons and electrons. protons of positive, electrons negative.
- 27why are electrons not included in the mass number?the mass number is so small we ignore it (negliable)
- 28Describe 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 - 29Describe the differences between oxygen-18 and oxygen-16.the differences are:
1. Number of neutrons (8v10)
2. atomic mass
Informationen
- Beschreibung
- about the reactivity of metals as well as electron configuration, ions and isoptops
- Erstellt von
- katie Dack · Jan 2016
- Aktualisiert
- 19 Feb 2016
- Aufrufe
- 29
- Tags
- Bewertung