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phy. ch. 17
vocab and questions
| Answer | Question |
|---|---|
| atoms | the smallest particle of an element that can be identified with that element are... |
| element | a substance made of only one kind of atom is... |
| Brownian motion | evidence that atoms exist, as it results from the motion of neighboring atoms and molecules is... |
| molecule | the smallest particle of substance consisting of 2 or more atoms of the same or different elements bonded together is... |
| compound | a chemical substance made of atoms of 2 or more different elements combined in a fixed proportion is... |
| chemical formula | a description that uses numbers and symbols of elements is... |
| nucleons | the principal building block of the nucleus (protons/neutrons) are... |
| neutrons | an electrically neutral particle that is one of the 2 kinds of particles found in the nucleus of an atom are... |
| protons | a positively charged partical in the nucleus are... |
| isotopes | atoms of the same element having different numbers of neutrons are... |
| atomic number | the number of protons in the nucleus is... |
| ion | what an atom is called when the number of electrons is more or less than the number of protons in the atom is... (atom = net charge, no longer neutral) |
| shell model of the atom | model where electrons are grouped in concentric shells around the nucleus is... |
| periodic table | chart that lists elements by atomic number and by electron arrangements is... |
| plasma | a 4th phase in matter is... |
| nucleus | the positively charged center of the atom is... |
| protons and neutrons | mass number =... |
| number of electrons | number of protons =... |
| the number of protons in the nucleus | atomic number =... |
| fusion... in stars | What forms heavier elements and where? |
| in your body | Atoms __________ have been around since long before the solar system came into existence, more than 4.6 billion years ago. |
| neighboring atoms and molecules | Brownian motion is evidence that atoms exist, as it results from the motion of ___________________. They bump into the larger particles we can see. |
| Atoms of same or different elements | What are molecules made up of? |
| millions of atoms | Complex molecules are made up of... |
| in the nucleus | Where is most of the mass of atom located? |
| 1st-2 2nd-8 outer shell- no more than 8 | How many electrons can be held in each orbital? |
| the atoms physical and chemical properties | What does the arrangement of electrons in the shells dictate? |
| bonding | the attraction between protons and electrons that can cause atoms to combine |
| covalent bonds | form when two atoms share electrons |
| ionic bonds | form when electrons are transferred between atoms |
| gases | atoms move the fastest in... |
| liquids | atoms move faster in... |
| solids | atoms move slowest in... |
| matter was made of atoms | John Dalton studied chemical reactions ans said that... |
| the number of outer electrons | in the periodic table, groups (columns) show... |
| the number of electron shells | in the periodic table, periods (rows) show... |
Created by:
14_ezilchUA
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