Flashcards
chemistry c3
Flashcards do conjunto (11)
- 1what is the structure of an atom?protons and neutrons in the centre, electrons around the outside
- 2what do the columns shown on the periodic table?the columns tell us how many electrons are on the outside shell.
- 3what do the rows show us on the periodic table?the rows show us how many shells there are.
- 4how many protons are in a carbon atom?carbon atoms always have 6 protons.
- 5what is an isotopes?an isotopes is an atom where the number of neutrons might change.
- 6what does the number next to isotopes signify?the mass.
- 7what is a endothermic reaction?an endothermic reaction is where more energy goes into breaking the bonds and less energy is released by making the bonds.
- 8what is a exothermic reaction?an exothermic reaction is where it doesn't take much energy to break the bonds but lots of energy is released when the new bonds are made.
- 9what do you need for two particles to react? (collision theory)1) they must collide.
2) must have enough energy (more than the activation energy) - 10what happens to the particles when the temperature is hot?-when they are hot the particles have more kinetic energy.
-more frequently. - 11—
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- FlashCards sobre chemistry c3, criado por beth Mcintyre em 19-02-2017.
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- beth Mcintyre
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