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 Review Sheet
Vocabulary
| Term | Definition |
|---|---|
| elements | the basic building blocks of matter, consisting of a single type of atom that cannot be broken down into simpler substances by chemical means |
| compounds | a substance formed when two or more different chemical elements are chemically bonded together in a fixed ratio |
| mixtures | a physical combination of two or more substances that are not chemically bonded |
| molecules | a group of two or more atoms bonded together, representing the smallest particle of a substance that retains its chemical identity |
| atoms | the basic building blocks of all matter, consisting of a central nucleus containing positively charged protons and neutral neutrons, surrounded by negatively charged electrons |
| protons | positively charged particles found in the nucleus |
| electrons | negatively charged particles found around the nucleus |
| neutrons | particles with no electric charge, found in the nucleus of an atom alongside protons |
| Lewis Dot Structures | diagrams that represent the valence electrons of atoms and the covalent bonds between them in a molecule |
| chemical symbols | they are used to represent a symbol |
| atomic numbers | the number of protons in the nucleus of an atom, which uniquely identifies a chemical element |
| periods | periods are the horizontal rows in the periodic table |
| groups | the vertical columns of elements, numbered 1 to 18, where atoms share the same number of valence electrons, leading to similar chemical and physical properties |
| noble gases | nonmetallic, nonreactive elements found in the rightmost column (Group 18) of the periodic table, including helium, neon, argon, krypton, xenon, and radon |
| halogens | a group of seven highly reactive nonmetallic elements found in Group 17 of the periodic table |
| alkali metals | a group of six highly reactive, soft, silvery-white metals in Group 1 of the periodic table: lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr) |
| ions | atoms or groups of atoms that have a net electrical charge, either positive or negative |
| ionic bonds | the electrostatic attraction between oppositely charged ions, which forms when one atom transfers electrons to another |
| covalent bonds | a chemical bond that involves the sharing of one or more pairs of electrons between two atoms |
Created by:
user-1904001