Conrad: Show the official table image instead of a wikitext copy; row anchors now land on the image

2026-10-25T21:39:51Z

Show the official table image instead of a wikitext copy; row anchors now land on the image

Conrad: Chemistry reference tables (2025 Edition): new reference table page

2026-10-25T19:50:36Z

Chemistry reference tables (2025 Edition): new reference table page

New page

{{Chemreftable
|name=Selected Units
|prev=Mathematical Relationships
|next=Selected Metric Prefixes
|desc=Selected Units from the NYS Chemistry Reference Tables (2025 Edition): the symbols and names of the eleven units used on the Chemistry Regents, from atm and degrees Celsius to pascal and second.
}}
The '''Selected Units''' table from the ''Reference Tables for Physical Science: Chemistry'' (2025 Edition) gives the symbol and name of each unit used on the exam. No standard depends on it in particular, but it is the place to check what a symbol stands for in a quantitative question, so it is listed with the standards that involve calculations, [[HS-PS1-9]] and [[HS-PS3-1]].

{| class="wikitable" style="text-align:center;"
! Symbol !! Name
|-
| atm || atmosphere
|-
| °C || degrees Celsius
|-
| g || gram
|-
| Hz || hertz
|-
| J || joule
|-
| K || kelvin
|-
| L || liter
|-
| m || meter
|-
| mol || mole
|-
| Pa || pascal
|-
| s || second
|}

== What the units table shows ==
Eleven base units: the atmosphere and the pascal for pressure (related by [[Mathematical Relationships#pressure|1 atm = 101.3 kPa]]), degrees Celsius and kelvin for temperature (related by [[Mathematical Relationships#temperature|K = °C + 273.15]]), the gram, the hertz, the joule, the liter, the meter, the mole and the second. Units built from these with a prefix (kPa, kJ, mL, nm) take the factors in [[Selected Metric Prefixes]], and derived units such as g/mol, mol/L (M) and J/g·K are written out from the base units. The 2011 edition's Table D also named the quantity each unit measures and had a somewhat different list: it included the minute, hour, day and year, M for molarity, the atomic mass unit (u) and ppm, while atm, °C and Hz are new in the 2025 edition.

== Regents Exam Questions ==
Released Regents questions that cannot be answered without this table, listed by exam. Each link opens the question with its answer key; the standard is the one the question assesses.

''No released question has needed this table yet.''

@@ Line 7: / Line 7: @@
 The '''Selected Units''' table from the ''Reference Tables for Physical Science: Chemistry'' (2025 Edition) gives the symbol and name of each unit used on the exam. No standard depends on it in particular, but it is the place to check what a symbol stands for in a quantitative question, so it is listed with the standards that involve calculations, [[HS-PS1-9]] and [[HS-PS3-1]].
-{| class="wikitable" style="text-align:center;"
+[[File:Selected Units.png|320px|class=img-fluid|alt=Selected Units from the Chemistry Reference Tables (2025 Edition)]]
 == What the units table shows ==

Selected Units - Revision history

Conrad: Show the official table image instead of a wikitext copy; row anchors now land on the image

Conrad: Chemistry reference tables (2025 Edition): new reference table page