523528
Descrição
FlashCards por CC Gwillim, atualizado more than 1 year ago
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Criado por CC Gwillim
quase 11 anos atrás
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| Questão | Responda |
| Atoms are the small particles... | ...that make up all matter. |
| The nucleus contains the particles: | protons and neutrons. |
| _____ moves around the outside of the atom? | Electrons |
| Protons have a... | ...positive electric charge. |
| Neutrons have... | ...no electric charge. |
| Electrons have... | ...a negative electric charge. |
| Protons and neutrons are... | ...much heavier than electrons. |
| The mass number is... | ...the number of protons and neutrons added together. |
| The atomic number is... | ...the number of protons and the number of electrons. |
| How do I find the number of protons or the number of electrons? | You just find out the atomic number (smaller number). |
| How do I work out the number of neutrons? | You just subtract the atomic number from the mass number (big number minus small number). |
| What are Isotopes? | Isotopes are atoms with the same atomic number but different mass numbers -> same numbers of protons/electrons but different number of neutrons. |
| How do I work out the overall mass number? | Add the fraction of one isotope times by the mass number for that isotope to the fraction for the other isotope times by the mass number for that isotope. |
| True or False: In the periodic table, elements in vertical groups are similar. | True. |
| What are the horizontal rows in the periodic table called? | Periods. |
| The group number tells you... | ...the number of electrons in the outer shell eg: group 1 atoms have 1 electron in their outer shells. |
| Are the noble gases "happy" or "sad"? Why? | They are happy because they have full outer shells and are stable. |
| Metals and non-metals can react together by giving and gaining electrons in... | ...ionic bonding. |
| An ion is... | ...a positively or negatively charged particle. |
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