Physical Science Quarter 1 Vocabulary

The comparison of a measurement to an accepted or expected value

• Accuracy

• Precision

• Percent Error

• Repeatability

An element in Group 1 of the periodic table, having one valence electron that it can easily lose to form a 1+ cation, making it extremely reactive; the most reactive of all of the metals

• Alkaline Metals

• Alkaline Earth Metals

• Halogens

• Noble Gases

An element in Group 2 of the periodic table, having two valence electron that it tends to lose easily to form a 2+ cation, making it very reactive

• Alkaline Metals

• Alkaline Earth Metals

• Halogens

• Noble Gases

A negatively charged ion

• Positive Ion

• Anion

• Cation

• Negative Ion

The building block of all matter; consists of protons, electrons, and (usually) neutrons

• Ion

• Atom

• Compound

• Pure Substance

Tags

NGSS.MS-PS1-1

The weighted average of the masses of all the naturally occurring isotopes of an element

• Atom

• Mass Number

• Atomic Mass

• Atomic Number

The unique number of protons found in every atom of a particular element

• Atomic Mass

• Mass Number

• Atomic Number

• Ion Number

A compound made from only two elements

• Binary Compound

• Diatomic Element

• Pure Substance

• Mixture

Tags

NGSS.MS-PS1-1

The atomic model in which electrons travel in distinct spherical regions called energy levels at fixed distances from the nucleus

• Bohr Model

• Plum Pudding Model

• Electron Cloud Model

• Periodic Model

A positively charged ion

• Anion

• Cation

• Ion

• Positive Ion