Unit 01: Investigating Chemicals

The formation of a new substance with different properties; cannot be undone by physical means

• nuclear change

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A representation of a compound in which the elements are represented by their symbols and subscripts represent the number of atoms of each element.

• nuclear reaction

• states of matter

• chemical change

Tags

NGSS.MS-PS1-1

Representation of the name of an element; written as a capital letter or a capital letter followed by a lowercase letter(s)

• chemical symbol

• elemental symbol

• reactivity equation

a pure substance made by chemically combining two or more elements; represented by a chemical formula

• compound

• element

• atom

a pure substance that cannot be broken down chemically into simpler substances

• compound

• element

• atom

change which alters the physical properties of a substance without changing its identity

• chemical change

• nuclear change

• physical change

the solid that is formed as a result of a chemical change

• snow

• precipitate

• calcium carbonate

Tags

NGSS.MS-PS1-2

a substance that is not mixed with any other substance

• mixture

• chocolate chip cookie dought

• pure substance

the number written to the right and slightly below an element in a chemical formula; represents the number of atoms of an element present in a chemical formula

• superscript

• subscript

• character