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SHMS7 Intro to Atoms
Ch 3 sec 1
Question | Answer |
---|---|
Nucleus | The central core of an atom containing protons and usually neutrons. |
Proton | A small, positively charged particle in the nucleus of the atom. |
Neutron | A small particle in the nucleus of the atom, with no electrical charge. |
Electron | A tiny negatively charged particle that moves around the nucleus of an atom. |
Atomic Number | The number of protons in the nucleus of an atom. |
Isotope | An atom with the same number of protons and a different number of neutrons from other atoms of the same element. |
Mass Number | The sum of protons and neutrons in the nucleus of an atom. |
Model | In science, a diagram, a mental picture, a mathematical statement, or an object that helps explain ideas about the natural world |
Describe the structure of an atom | Atoms are made of even smaller particles called protons, neutrons and electrons. |
Describe the elements in terms of their atoms | An element can be identified by the number of protons in the nucleus of its atoms |
Explain how models are useful for understanding atoms | Because atoms are so small, scientist create models to describe them |