14565596
Description
Flashcards by Lucy Crowe, updated more than 1 year ago
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Created by Lucy Crowe
over 5 years ago
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| Question | Answer |
| How many groups are there in the periodic table? | 18 |
| What is chemistry? | Chemistry is the study of how atoms arrange themselves and rearrange themselves in various ways. |
| What does neutrally charged mean? | Neutrally charged means that it has the same amount of protons and electrons. |
| What is an element? | The term element refers to the type of atoms they are, if there is only one type of symbol it is an element. |
| What is a pure element? | A pure element means that all the elements present are of the same type. |
| What is a molecule? | When atoms bond together in small clusters, they can be made of different or similar atoms. |
| How is a molecule formed? | A molecule is formed when two or more atoms join together chemically. |
| What is a mixture? | Mixtures are formed when different compounds or elements are put together without bonding. |
| What is a compound? | When atoms of at least 2 different elements are bonded together. |
| What is an ion? | An atom that is electrically charged. The number of protons and electrons is different. |
| What is an ionic compound? | An ionic compound is 2 elements that are bound together and they're charged. |
| What is an isotope? | Isotopes are created when the number of neutrons is different in each version of the element. |
| What is a neutron? | Not positive or negative |
| What is an electron? | Have negative and on outer shell |
| What is a proton? | Have a positive mark and in the nucleus. |
| What is an electron shell? | Have electrons on them. As each shell gets further from the nucleus, its energy level increases and the shell gets larger (and is able to hold more electrons). |
| What are the different electron shell layers? | The 1st shell (inner shell) can only hold a maximum of 2 electrons. The 2nd shell can hold up to 8 electrons until it is full. The 3rd shell can actually hold 18 electrons but it only fills up 8 electrons before the next shell starts filling. |
| What is the outer shell on an electron called? | A valence |
| What is a nucleus? | The tiny but heavy centre of the atom is called the nucleus. It contains two types of particles: neutron and protons. |
| How do you work out the number of neutrons? | number of neutrons = (mass number - number of protons) |
| How do you work out the number of electrons? | the number of electrons = the number of proton |
| How do you work out the number of uncharged atoms? | For uncharged atoms, the number of electrons must equal the number of protons. |
| What is the electron configuration? | A listing of the number of electrons in each shell is called the electron configuration. |
| What happens as electrons gain more energy? | They orbit further from the nucleus. |
| How much energy is emitted if there is a red light? | If red light is emitted, a small amount of energy has been released (long wavelength), so the electrons are jumping a small way. |
| How much energy is emitted if there is a purple light? | If purple light is emitted, a large amount of energy is released (short wavelength), so the electrons are jumping a long way. |
| _____ and ____ attract each other? | Positives and negatives attract each other. |
| What are lattices? | They are atoms stacked in alternating arrangements. |
| How many periods are there in the periodic table? | 7 |
| How many elements are there in the periodic table? | 109 |
| What is a molecule of an element | When the same type of atoms bond together to form chemical bonds. |
| What is a Molecule of a compound? | When atoms of at least 2 different elements bond together to form chemical bonds. |
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