Flashcards
study guide chem
Cards in this deck (26)
- 1element are divided intometals and nonmetals
- 2where are metals located in the periodic tableto the left
- 3where are nonmetals locatedto the right
- 4metalloids are located where?along the heavy zigzag line between the metals and nonmetals
- 5group one of the periodic table is calledthe Alkali metals
- 6group two of the periodic table is calledearth metals
- 7what are atomstiny particles of matter
two or more different elements combine to form compounds and rearranged to form new combination in a chemical reaction - 8Atoms contain subatomic particles what has a positive charge and what has a negative charge and what are neutral- protons positve charge
- electrons negative charge
- neutrons are neutral - 9An atom has nucleus in the what area and what does the nucleus containthe nucleus is in the center and it contains protons and neutrons
- 101 atomic mass unit is defined as1/12 of the mass of the carbon 12 atom
- 11a proton has a mass ofabout 1 (1.007) amu
- 12a neutron has a mass ofabout 1 (1.008) amu
- 13electron has a very small mass,0.000549 AMU
- 14what does AMU stand forAtomic mass unit
- 15The atomic number isis specific for each element
is the same for all atoms of an element
is equal to the number of protons in an atom
appears above the symbol of an element - 16an atom has an equal ofprotons and electrons
- 17mass number isrepresent the number of particles in the nucleus
is equal to the number of protons + number of neurtons - 18isotopesare the different atoms of the same elements which have the same protons and different numbers of neutrons, ( different mass numbers
- 19Nuclea symbolrepresent a particular atom of an element.
mass number given in the upper left corner and the atomic number in the lower left corner - 20for an atom, the nuclear symbol gives the number ofprotons
neutrons
electrons - 21if two letters of elements are capitalized, they representthe symbols of two different elements
eg. element cobalt has the symbol of CO, which stands for C, Carbon and O for oxygen - 22the last group of the periodic table isNoble gas
- 23The second to the last group of the periodic table ishalogens group
- 24what group of the periodic table is highly reactivehalogens group
- 25what determines the mass of an atommass of protons and netrons
- 26what subatomic particle is ignored during atomic mass calculation and why is thatElectron is ignored because it mass is so small
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- Flashcards on study guide chem, created by Samuel Ames on 27/09/2021.
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- Samuel Ames
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