377320
Descrição
FlashCards por PatrickNoonan, atualizado more than 1 year ago
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Criado por PatrickNoonan
mais de 10 anos atrás
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| Questão | Responda |
| Atomic number is used to identify what element an atom belong to | Each element has a unique atomic number |
| The atomic number is the number of protons in the nucleus | The symbol for the atomic number is 'Z' |
| The mass number of an atom is the number of protons + neutrons | The symbol for the mass number is 'A' |
| If atoms have the same atomic number but different mass number they are... | Isotopes |
| Isotopes were first suggested by Frederick Shoddy in 1913 | Carbon 14 is an isotope used in dating artifacts |
| The periodic table is a list of all known elements ordered by atomic number | Dmitri Mendeleev ordered the first periodic table by atomic number |
| The modern periodic table contains 118 elements | New elements are still being discovered! |
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