Karteikarten
chemistry
Karten in diesem Stapel (15)
- 1chemistryatomic structure and periodic ;table,bonding,structure and the properties of matter;the rate and extent of chemical change ;chemistry of the atmosphere.
- 2Atomsatoms have the radius of about 0.1 nanometers .
atoms have a nucleus and electrons - 3the Nucleus1.) its in the middle of the atom.
2.) it contains protons and neutrons .
3.) the nucleus has the radius of around 1x10^(-14).
4.) it has a postive charge because of the protons.
5.) almost the whole mass of the atom is concentrated in the nucleus. - 4Electrons1.) move around the nucleus in electron shells.
2.) They're negatively charged and tiny,but they cover a lot of space.
3.) the volume of their orbits determines the size of the atom.
4.) electrons have virtually no mass - 5particle relative mass and chargeparticle / relative mass / charge
proton 1 +1
neutron 1 0
electron very small -1 - 6number of protons equal number of electrons .p.11.) Atoms are neutral - they have no charge overall.
2.) This because they have the same number of protons as electrons . - 7number of protons equal number of electrons .p.23.) the charge on the electrons is the same size as the charge on the protons, but opposite - so the charges cancel out.
4.) in an ion , the number of protons doesn't equal the number of electrons. this means it has an overall charge. for example, an ion with a 2-charge,has two more electrons than protons. - 8atomic number and mass number describe an atom .p.11.) the nuclear symbol of an atom tells you its atomic (protons) number and mass number.
2.) the atomic number tells you how many protons there are. - 9atomic number and mass number describe an atom .p.23.) The mass number tells you the total number of protons and neutrons in the atom.
4.) To get the number of neutrons, just subtract the atomic number from the mass number. - 10ELEMENTSan element is a substance made up of atoms that all have the same number of protons in their nucleus.
- 11Elements consist of atoms with the same atomic number .p.11.) atoms can have different numbers of protons, neutrons and electrons. its the number of protons in the nucleus that decides what type of atom it is.
- 12Elements consist of atoms with the same atomic number .p.22.) for example an atom with one proton in its nucleus is hydrogen and an atom with two protons is helium.
- 13Elements consist of atoms with the same atomic number .p.33.) i a substance only contains atoms with the same number of protons its called an element.
there are about 100 different elements. - 14Elements consist of atoms with the same atomic number .p.44.) so all the atoms of a particular elements (e.g. nitrogen) have the same number of protons and different elements have atoms with different numbers of protons.
- 15COMPOUNDS
Informationen
- Beschreibung
- Karteikarten am chemistry, erstellt von Tobias Andrews am 03/12/2018.
- Erstellt von
- Tobias Andrews
- Aufrufe
- 0
- Bewertung