Term | Definition |
Matter | Is everything that has mass and takes up space |
Mass | How much matter is in an object |
Density | Relates to the mass in given volume |
Volume | The amount of space matter occupies |
Atom | Basic particle in all elements |
Electron | A particle with a negative charge |
Proton | A particle with positive charge |
Neutron | A particle with neutral charge |
Periodic table | A grid with all known elements and their atomic number |
Element | is the simplest substance cannot be broken down |
Periods/Rows | Tells how many energy levels an element has |
Groups/Columns | How many valence electrons an element has |
Valence electrons | Electrons on outer shell |
Atomic number | How many protons in the middle of elements nucleus/ usually same electrons and neutrons |
Atomic Mass | How much mass in a elements atoms |
Chemical property | The ability to combine with another substance to form a new one |
Physical property | The appearance or state of a substance |
Ionic Bond | Elements lose/gain electrons during bond |
Covalent bond | When electrons are shared during bonding |
Chemical change | Elements bond through attractive force of electrons |
Compound/Molecule | Two or more elements in a specific ratio / new substance |
Mixture | Two or more substances combine and keep same properties |
Nobel Gases | All elements in group 18 Most stable |
Halogens | All elements in group 17 very reactive 7 valence electrons |
Alkali Metals | All elements group 1 very reactive only 1 valence electrons |
Metalloids | Elements between metal and non 3-7 valence Electrons |