Flashcards
Sem título
Flashcards do conjunto (19)
- 1What are atoms made up of?Protons, neutrons and electrons
- 2what are nucleons?protons and neutrons
- 3what is the relative charge and relative mass of a proton?relative charge = +1
relative mass = 1 - 4what is the relative charge and relative mass of a neutronrelative charge = 0
relative mass = 1 - 5what is the relative charge and relative mass of an electron?relative charge = -1
relative mass = 0.0005 - 6Zproton number
- 7no two elements have the same number of __________protons
- 8Anucleon number
- 9isotopes have the same _______ _______ but different ________ ________same proton number but different nucleon numbers
- 10what are atoms with the same number of protons but different number of neutronsisotopes
- 11does changing the number of neutrons affect an atom's chemical propertiesno
- 12what is a property of a 'neutral' atomproton number = electron number
- 13what does an element's reactions and chemical behaviour depend on?the number of electrons
- 14what DOES the number of neutrons affect in a nucleus?the stability of the nucleus
- 15unstable nuclei may be ________ and _____ over time into different nuclei which are more ______unstable nuclei may be radioactive and decay over time into different nuclei which are more stable
- 16what can radioactive isotopes be used for?to find out how old stuff is
- 17all livings things contain the same % of _________ taken in from the atmosphere. After they die the amount of _______ inside them ________ over time as it _______ into stable elementsall livings things contain the same % of carbon-14 taken in from the atmosphere
After they die the amount of carbon-14 inside them decreases over time as it decays into stable elements - 18what do scientists use to calculate the approx. age of archaeological finds?organic matter (e.g. wood, bone) by using isotopic data (amount of each isotope present) to find the % of radioactive carbon-14 left in the object
- 19what is the specific charge equation? and what are its units? (not given)Charge / Mass
units = C/kg
Informações
- Descrição
- FlashCards sobre Sem título, criado por Caitlin Kerr em 11-05-2018.
- Criado por
- Caitlin Kerr
- Visualizações
- 0
- Avaliação