2896096
Descripción
Fichas por matt_shell, actualizado hace más de 1 año
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Creado por matt_shell
hace más de 9 años
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| Pregunta | Respuesta |
| What information does an atomic number give you? | The number of protons in an atom. |
| What information does a mass number give you? | The total number of protons and neutrons in an atom. |
| Why do elements in the same group of the periodic table have similar chemical properties? | They have the same number of electrons in their outer shell. |
| How many electrons do Group 1 elements have in their outer shell? | They each have one electron in their outer shell. |
| What is another name for the Group 0 elements? | The noble gases. |
| Why are Group 0 elements unreactive? | They have a stable arrangement of electrons. / They have a full outer shell. |
| What is the charge of an Atom? | Atoms have no charge overall. They are neutral. |
| Describe the structure of an atom. | Atoms have a small nucleus surrounded by electrons. The nucleus is in the middle of the atom and contains protons and neutrons. The electrons occupy shells around the nucleus. |
| What is the relative charge of... A) a proton? B) a neutron? C) an electron? | A)+1 B) 0 C) -1 |
| What feature of an atom determines what type of atom it is? | The number of protons in its nucleus. |
| What is an element? | An element is a substance that only contains one type of atom. |
| Approximately how many elements are there? | There are about 100 elements. |
| What is another name for an electron shell? | An energy level. |
| How many electrons can go in the first electron shell? | 2 electrons |
| How many electrons can go in the second electron shell? | 8 electrons |
| How many electrons can go in the third electron shell? | 8 electrons |
| Which shell fills with electrons first? | The one closest to the nucleus. / The one with lowest energy level. |
| What is a molecule? | A molecule is two or more atoms held together by covalent bonds. |
| What is an ion? | An ion is a charged particle. |
| Do metal atoms form positive ions or negative ions? | Positive ions. |
| Do non-metal atoms form positive ions or negative ions? | Negative ions. |
| If a compound is formed from a metal and a non-metal, what type of bonding will be present in the compound? | Ionic bonding. |
| What type of bonding holds the atoms in a molecule together? | Covalent bonding. |
| 30 g of magnesium oxide is formed from 18 g of magnesium. How much oxygen reacted? | 30 – 18 = 12 g as the mass of the reactants equals the mass of the products |
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