Unit 4 Vocab
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| atomic mass | average mass of one atom of an element
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| periodic table | a chart where all elements are organized into periods and groups according to their properties
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| chemical symbol | a one or two letter code that stands for an element
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| period | A ROW of elements in the periodic table arranged by atomic number
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| group | column of elements in periodic table, which elements have certain properties in common (chemical family)
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| matter | material that all objects and substances are made of; anything with mass and space
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| element | substances that are the building blocks of all matter; made up of 1 kind of atom
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| compound | matter made of 2 or more elements; chemically bonded (can't be separated by physical means)
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| atom | smallest particle into which an element can be divided and still have the properties of that element
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| electron | negatively charged particle on the outside of the nucleus of an atom
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| nucleus | center of an atom, made up of protons and neutrons
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| proton | positively charged particle located in the nucleus of an atom
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| neutron | small particle in nucleus of an atom with no electrical charge
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| energy level | the amount of energy carried by electron in an atom; determines electron's average distance from nucleus
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| isotope | atoms of the same element with different numbers of neutrons in the nucleus and thus different atomic masses
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| Mass number | sum of protons and neutrons in nucleus of an atom
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| Atomic number | number of protons in the nucleus of one atom of an element
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| metal | elements,usually solid, with a shiny surface; conduct electricity and thermal energy well
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| malleable | element that has some characteristics of both metals and nonmetals
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| ductile | term used to describe a material that can be pulled out into a long wire
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| conductivity | ability of an object to transfer heat or electricity to another object
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| reactivity | the ease and speed with which an element combines or reacts with other elements and compunds
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| corrosion | way in which acids react with some metals so as to eat away the metal
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| Alkali metal | Elements in Group 1 of periodic table
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| Alkaline earth metal | Elements in Group 2 of periodic table
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| Transition metal | one of the elements in Groups 3-12 of periodic table
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| alloy | mixture of 2 or more elements, one of which is a metal
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| nonmetal | element that lacks most of the properties of a metal
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| Diatomic molecule | molecule consisting of 2 atoms
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| halogen | Elements found in Group 17 of periodic table
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| Noble gas | Elements found in Group 18 of periodic table
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| metalloid | element that has some characteristics of both metals and nonmetals
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| semiconductor | substance that can conduct electricity under some conditions
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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