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Description
Flashcards by Addna Dahir, updated more than 1 year ago
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Created by Addna Dahir
almost 6 years ago
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| Question | Answer |
| What are atoms? |
The smallest particle of a chemical element that can exist.
Image:
Rutherford Atom (image/png)
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| How many types of atoms are there? | 118 known types. |
| How many atoms are natural? | 98 atoms. |
| How many atoms are man made? | 20 atoms. |
| What are molecules? | A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction. |
| What is a crystal lattice? | The symmetrical three-dimensional arrangement of atoms inside a crystal. |
| What is a element? | A substance made up of one atom. |
| What is an anion? | An ion that has more electrons than protons and is negatively charged. |
| What is a cation? | An ion that has fewer electrons than protons and is positively charged. |
| What is a proton? | a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron. |
| What is a neutron? | a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen. |
| What is a subamotic particle? | The particles an atom is made up of protons, neutrons and electrons. |
| What is an electron? | A small negatively charged particle ; clouds of electrons surround the nucleus of an atom. |
| What is an atomic number? | The number of protons in a nucleus; the atomic number determines what type of atom it is. |
| What is a mass number? | The number of protons and neutrons in an atom. |
| What is an ion? | An atom that has gained or lost an electron. |
| What is nucleus? | A cluster of neutrons and protons at the centre of the atom. |
| What is the force that attracts electrons to the nucleus? | Electrostatic attraction |
| What is the force that makes protons repel each other? | Electrostatic repulsion |
| What is the force that holds protons together in the nucleus? | Nuclear force |
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