Periodic Table Flashcards
Matter
Anything that has mass and takes up space
Atom
The smallest piece of an element that still has the properties of that element
Element
Substance that cannot be broken down into a simpler substance by ordinary means. Example: hydrogen.
Mixture
Contains more than one element or compound spread among each other. Mixtures have the properties of the substances they are made of. Mixtures can be separated without a chemical change, example by filtering.
Compound
Made of two or more different kinds of atoms joined together (by a chemical reaction). Compounds have properties which are different from those of the elements they are made of.
Physical change
Change where a physical property of matter is altered, but the substance remains the same kind of matter.
Chemical change
Change matter undergoes when it turns into a new substance
Atomic number
Elements are arranged in order by their atomic number. The atomic number represents the number of protons in the nucleus of the atom/element.
Atomic mass
(weight)- the number of protons and neutrons in the nucleus of an atom. (rounded to the nearest whole number for our class.)
Proton
A positively charged subatomic particle inside the nucleus of an atom
Neutron
A neutral subatomic particle inside the nucleus of an atom
Electron
A negatively charged subatomic particle found outside of the nucleus of an atom
Nucleus
The center of an atom where protons and neutrons are located and contains the majority of mass for an atom
Period
7 horizontal rows on the periodic table where elements are arranged gradually and predictably based on their atomic number
Group
18 vertical columns on the periodic table where elements are arranged according to similar physical and chemical properties they share within a given group