Database App

The Database app contains element and physical constant data. You can browse the stored data, edit values, and use the values in other applications.^*

Values of atomic weights and physical constants can be saved to alpha variables. You can also batch-save element data as Spreadsheet app data.

Note

Elements and physical constant notations and values are subject to change. Refer to the beginning of each section of this chapter (Periodic Table and Fundamental Physical Constants) for the original data to which this calculator conforms.

The Database app has a function for editing and saving recorded atomic weight and physical constant values. The values you edit and save are retained even if you update the Database app to a newer version. To overwrite saved values with the values of the updated version, use the operations under Initializing All Atomic Weight Values and To initialize all physical constant values to restore the atomic weight and physical constant values to their initial default values.

Periodic Table

You can select an element from the periodic table of elements and display information about it. You can also search for elements by name or atomic weight.

Note

The atomic weights displayed by the Database app are in accordance with the IUPAC (International Union of Pure and Applied Chemistry), 2021.

The electron configuration displayed by the Database app complies with the CRC Handbook of Chemistry and Physics, 91st Edition.

Selecting an Element from the Periodic Table to Display Its Information

Example: On the periodic table, select gold (element symbol: Au), atomic number 79 to display its detailed information.

h > Database

Highlight [Periodic Table] and then press O or r.

This displays the periodic table. In this case, the cursor (①) appears at hydrogen (element symbol: H) with atomic number 1. The symbol, atomic number, and atomic weight of the element at the cursor location are also displayed at location ②.

Use the cursor keys to move the cursor to atomic number 79.

Instead of using the cursor keys to move the cursor, you can also search for an element by its name or atomic number. The following is an example of how to search by atomic number.

Select T > [Search] > [Atomic No.‎].
Use the dialog box that appears to input 79, and then press O.

To display detailed information about the element where the cursor is located, press O.

This displays detailed information about the element. The following is the detailed information that appears.

Atomic number, element symbol, element name, properties
Electron configuration
Image of the element and explanation of the image
Atomic weight^*

Atomic weights of elements that do not have stable isotopes are enclosed within square brackets ([ ]). For example, a number like [209] shows the mass number of the longest-lived isotope of that element. However, since thorium (Th), protactinium (Pa), and uranium (U) do have a characteristic terrestrial isotopic composition, their atomic weights are not enclosed in square brackets. The names of elements whose atomic weights are enclosed in square brackets have an asterisk (*) next to them.

To return to the periodic table, press b or O.

Highlighting Elements of a Specific Classification on the Periodic Table

You can use the operations below to highlight the elements of a specific classification.

To highlight the elements of this classification:	Select this menu item:
Transition Elements	T > [Series] > [Transition]
Alkali Metals	T > [Series] > [Alkali Metals]
Alkali Earth Metals	T > [Series] > [Alkaline Earth Metal]
Halogens	T > [Series] > [Halogens]
Noble Gases	T > [Series] > [Noble Gases]
Rare Earth Elements	T > [Series] > [Rare Earth]

To unhighlight a classification, select T > [Clear].

Note

The classification of elements is not definitive. Classifications displayed by the Database app are those that are commonly accepted at the time this app was developed.

Saving Periodic Table Information as a Spreadsheet File

You can use the operation below to save periodic table information as a spreadsheet file.

Select T > [Store].

Use the dialog that appears to input up to eight characters for the file name and then press O.

The spreadsheet file contains the information below in columns A through D, in that order.
Atomic number (numeric), element symbol (text), electron sequence (text), atomic weight (numeric)^*

If the atomic weight value has been changed, the new value is saved. For information about changing the atomic weight value, see To edit an atomic weight value.

Initializing All Atomic Weight Values

You can use the operation below to restore all atomic weight values that have been edited using the operation under To edit an atomic weight value to their initial Database app values.

Select T > [Initialize Weight].

In response to the confirmation dialog that appears, select [OK].

Searching for an Element

You can use the methods shown in the table below to search for an element. If the element you are searching for is found, the cursor jumps to the element.

To search by this:	Perform this operation:
Element Name	Select T > [Search] > [Name]. Select the desired element name from the alphabetical list^*1 and then press O.
Element symbol	Select T > [Search] > [Symbol]. Select an element symbol from the alphabetical list^*1 and then press O.
Atomic number	Select T > [Search] > [Atomic No.‎]. Use the dialog that appears to input an atomic number and then press O.
Atomic weight	Select T > [Search] > [Weight]. Use the dialog that appears to input an atomic weight up to 12 digits long (including decimal point) and then press O.^*2

While the alphabetical list is displayed, you can press a key from X^A to 0^Z to jump to the top of the list for the letter whose key you pressed.

This searches for the element with the smallest atomic weight that is greater than or equal to the input value.

Enlarging the Periodic Table

Pressing + or < while viewing the periodic table zooms in on the area in the vicinity of the current cursor position. Pressing -, >, or b returns to the full table display. Note that the T key operation is disabled while the periodic table is zoomed.

Using the Detailed Information Screen

Pressing O while the periodic table is displayed switches to the detailed information screen for the element where the cursor is currently located. For details about the display contents of the detailed information screen, see Selecting an Element from the Periodic Table to Display Its Information. This section describes the operations you can perform while the detailed information screen is displayed.

To edit an atomic weight value

Display the detailed information screen for the element whose atomic weight value you want to edit.

Select T > [Edit] or press r.^*

This causes the cursor to appear to the left of the current atomic weight value.

Use l and r to move the cursor to the digit you want to edit and then edit it as required.

You can input only numbers and the decimal point for an atomic weight, which can be up to 12 digits long.

To cancel the editing operation, press b here.

To save an edited value, press O.

Instead of performing this operation, you can also press a number key to start editing.

To show/hide atomic weight value square brackets

Display the detailed information screen for the element whose square brackets you want to show or hide.

Select T > [1‎ ‎⇔‎ ‎[1]].

Each time you perform this operation, the square brackets ([ ]) around the atomic weight value are toggled between show and hide.

For information about the meaning of square brackets around an atomic weight, see the step 4 note under Selecting an Element from the Periodic Table to Display Its Information.

To restore edited atomic weight values to their initial default Database app values

Select T > [Initialize].

This returns the atomic weight value and the show/hide square brackets setting to their Database app initial default settings.

To store an atomic weight value to an alpha variable

Display the detailed information screen for the element whose atomic weight value you want to store.

Select T > [Store].

Use the dialog that appears to input one letter from A to Z and then press O.

This stores the atomic weight value to the alpha variable of the letter you input.

For details about alpha variables, see Using Alpha Variables.

Fundamental Physical Constants

The Database app maintains the values of the physical constants shown in the table below and displays them in a list grouped by category. You can edit the physical constant values and store them to an alpha variable for use in other applications.

Note

The values and names of the physical constants included in the Database app are based on 2022 CODATA.

Categorized List of Physical Constants

Category	Symbol	Name
Universal	c	speed of light in vacuum
	μ₀	vacuum magnetic permeability $4 π α ħ / (e^{2} c)$
	ε₀	vacuum electric permittivity 1/μ₀c²
	Z₀	characteristic impedance of vacuum $\sqrt{μ_{0} / ε_{0}}$ = $μ_{0}$ c
	G	Newtonian constant of gravitation
	h	Planck constant
	$ħ$	reduced Planck constant
	m_P	Planck mass ( $ħ$ c/G)^1/2
	l_P	Planck length $ħ$ /m_Pc = ( $ħ$ G/c³)^1/2
	t_P	Planck time l_P/c = ( $ħ$ G/c⁵)^1/2
Electromagnetic	$e$	elementary charge
	Ф₀	magnetic flux quantum $2 π ħ / 2 e$
	G₀	conductance quantum $2 e^{2} / 2 π ħ$
	K_J	Josephson constant $2 e / h$
	R_K	von Klitzing constant μ₀c/2α = $2 π ħ / e^{2}$
	μ_B	Bohr magneton $e ħ$ /2m_e
	μ_N	nuclear magneton $e ħ$ /2m_p
Atomic & Nuclear	α	fine-structure constant $e^{2} / 4 π ε_{0} ħ c$
	R_∞	Rydberg constant
	a₀	Bohr radius $ħ$ /αm_ec = $4 π ε_{0} ħ^{2} /$ m_e $e^{2}$
	m_e	electron mass
	μ_e	electron magnetic moment
	m_μ	muon mass
	μ_μ	muon magnetic moment
		tau mass
	m_p	proton mass
	μ_p	proton magnetic moment
	m_n	neutron mass
	μ_n	neutron magnetic moment
Physico-Chemical	N_A	Avogadro constant
	m_u	atomic mass constant m(¹²C)=2hc/R_∞α²c²A_r(e)
	F	Faraday constant N_A $e$
	R	molar gas constant R=N_Ak
	k	Boltzmann constant
	V_m	molar volume of ideal gas RT/p (273.15K, p=100kPa)
	σ	Stefan-Boltzmann constant $(π^{2} / 60) k^{4} / ħ^{3} c^{2}$
Adopted Values	K_J−90	conventional value of Josephson constant
	R_K−90	conventional value of von Klitzing constant
	g_n	standard acceleration of gravity

Displaying a Physical Constant and Its Information

h > Database

Highlight [Fundamental Physical Constants] and then press O or r.

This displays a list of Physical Constants categories.

CY875_V2_Database Displaying Physical Constant_1

Highlight the physical constant category whose values you want to display and then press O or r. For example, to display the value of Bohr magneton (μ_B), highlight [Electromagnetic] and then press O or r.

This displays a list of Electromagnetic category physical constants and their values.

CY875_V2_Database Displaying Physical Constant_2

See Categorized List of Physical Constants for information about the physical constants included in which category.

See Using a Physical Constant in a Calculation for information about operations that use physical constant values for calculations.

To display information about Bohr magneton, highlight the [μ_B] row and then press O or select T > [Description].

This displays a dialog with the applicable information (name, symbol, units). To close the dialog, press O or b.

CY875_V2_Database Displaying Physical Constant_3

To return to the category list, press b.

Editing a Physical Constant Value

To edit a physical constant value

Perform the first three steps of the procedure under Displaying a Physical Constant and Its Information to highlight the physical constant whose value you want to edit.

Select T > [Edit] or press r.^*

This displays the input cursor to the left of the value of the physical constant.

Use l and r to move the cursor to the digit you want to edit and then edit it as required.

Only up to 15 significant digits are stored, even if you input more than 15 digits.

An error (Syntax ERROR) occurs if you attempt to edit a constant using incorrect input.

An error (Math ERROR) occurs if you input a mathematically incorrect expression while editing a constant.

To cancel the editing operation, press b here.

To save an edited value, press O.

Instead of performing this operation, you can also press a number key to start editing.

To initialize a single physical constant value

Perform the first three steps of the procedure under Displaying a Physical Constant and Its Information to highlight the physical constant whose value you want to initialize.

Select T > [Initialize] > [Selected Constant].

To initialize all physical constant values

While the physical constant list screen is displayed, select T > [Initialize] > [All].

In response to the confirmation dialog that appears, select [OK].

Using a Physical Constant in a Calculation

The physical constant values can be stored to alpha variables for use in calculations by Calculate and other apps.

Example: To calculate the time required for light to reach the Earth from the Sun. This calculation uses the average distance from the Sun to the Earth (1 au = 149,597,870,700 m) and the speed of light in vacuum (c = 299792458 m/s), which is the calculator’s default value.

In the Physical Constants category list, select [Universal] and then press O.

Highlight [c] (speed of light in vacuum) and then select T > [Store Const. as Variable].

This displays a dialog for specifying the alpha variable storage destination.

CY875_V2_Database Using Physical Constant_1

Input one letter from A to Z and then press O.

Here, press j^CO, which stores the value to alpha variable C.

Select h > Calculate to start up the Calculate app.

Execute the calculation.

149597870700*Pj(C)E

CY876_Database Using Physical Constant_2

The calculation result shows it takes approximately 499 seconds for light to reach the Earth from the Sun.

For details about alpha variables, see Using Alpha Variables.

Using My Drawer

You can use My Drawer to store often-used physical constants.

To save a physical constant to My Drawer

Perform the first three steps of the procedure under Displaying a Physical Constant and Its Information to highlight the physical constant you want to store in My Drawer.

Select T > [Store in My Drawer].

To display physical constants saved to My Drawer

In the Physical Constants category list, select [My Drawer].

To delete a single physical constant that was saved to My Drawer

In the Physical Constants category list, select [My Drawer].

Highlight the physical constant you want to delete from My Drawer.

Select T > [Delete] > [Selected Constant].

To delete all physical constants saved to My Drawer

In the Physical Constants category list, select [My Drawer].

Select T > [Delete] > [All].

In response to the confirmation dialog that appears, select [OK].