Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science flshcards
| Question | Answer |
|---|---|
| Element | a basic component of a whole, a fundamental substance in chemistry composed of a single type of atom, or a specific software application like the Matrix-based messaging client or a UI toolkit for web development |
| compounds | a thing that is composed of two or more separate elements; a mixture |
| mixtures | a physical combination of two or more substances that are not chemically bonded |
| molecules | a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction |
| atom | the basic building block of matter, consisting of a central nucleus made of positively charged protons and neutral neutrons, surrounded by a cloud of negatively charged electrons |
| protons | a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign |
| 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 |
| electron | a subatomic particle with a negative electric charge found in all atoms |
| Lewis Dot Structure | a diagram that uses the chemical symbols of elements and dots to show the valence electrons and bonding in a molecule |
| Chemical symbol | a one- or two-letter abbreviation used to represent a chemical element on the periodic table |
| Atomic number | the number of protons in an atom's nucleus, and it uniquely identifies a chemical element |
| period | a horizontal row on the periodic table |
| Group or family | a vertical column of elements on the periodic table, or a non-capturing group in regular expressions used to prevent backtracking |
| noble gasses | a group of chemical elements that are nonreactive due to their full electron shells |
| halogens | any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made |
| Alkali metals | a group of highly reactive elements in Group 1 of the periodic table |
| ions | an atom or molecule with a net electrical charge, created when it gains or loses one or more electrons |
| ionic bonds | a type of chemical bond formed by the electrostatic attraction between oppositely charged ions |
| Convalent bonds | a chemical bond formed by the sharing of one or more pairs of electrons between two atoms |
Created by:
user-1888843
Popular English Verbs sets