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  2. Group (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Group_(periodic_table)

    In the periodic table of the elements, each column is a group. In chemistry, a group (also known as a family) [1] is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered.

  3. Formative assessment - Wikipedia

    en.wikipedia.org/wiki/Formative_assessment

    Formative vs summative assessments. Formative assessment, formative evaluation, formative feedback, or assessment for learning, [1] including diagnostic testing, is a range of formal and informal assessment procedures conducted by teachers during the learning process in order to modify teaching and learning activities to improve student attainment.

  4. Operations order - Wikipedia

    en.wikipedia.org/wiki/Operations_order

    An Operation Order, often abbreviated to OPORD, is a plan format meant to assist subordinate units with the conduct of military operations.An OPORD describes the situation the unit faces, the mission of the unit, and what supporting activities the unit will conduct in order to achieve their commander's desired end state.

  5. Program-specific information - Wikipedia

    en.wikipedia.org/wiki/Program-specific_information

    The PSI data as defined by ISO/IEC 13818-1 (MPEG-2 Part 1: Systems) includes four tables: PAT (Program Association Table) CAT (Conditional Access Table) PMT (Program Mapping Table) NIT (Network Information Table) The MPEG-2 specification does not specify the format of the CAT and NIT. PSI is carried in the form of a table structure.

  6. GF (2) - Wikipedia

    en.wikipedia.org/wiki/GF(2)

    GF(2) is the only field with this property (Proof: if x 2 = x, then either x = 0 or x ≠ 0. In the latter case, x must have a multiplicative inverse, in which case dividing both sides by x gives x = 1. All larger fields contain elements other than 0 and 1, and those elements cannot satisfy this property).

  7. Mendeleev's predicted elements - Wikipedia

    en.wikipedia.org/wiki/Mendeleev's_predicted_elements

    To give provisional names to his predicted elements, Dmitri Mendeleev used the prefixes eka- / ˈ iː k ə-/, [note 1] dvi- or dwi-, and tri-, from the Sanskrit names of digits 1, 2, and 3, [3] depending upon whether the predicted element was one, two, or three places down from the known element of the same group in his table.

  8. Table of prime factors - Wikipedia

    en.wikipedia.org/wiki/Table_of_prime_factors

    The first: 2, 6, 30, 210, 2310, 30030, 510510, 9699690, 223092870, 6469693230, 200560490130, 7420738134810 (sequence A002110 in the OEIS). 1# = 1 is sometimes included. A factorial x ! is the product of all numbers from 1 to x .

  9. Table (information) - Wikipedia

    en.wikipedia.org/wiki/Table_(information)

    An example table rendered in a web browser using HTML. A table is an arrangement of information or data, typically in rows and columns, or possibly in a more complex structure. Tables are widely used in communication, research, and data analysis. Tables appear in print media, handwritten notes, computer software, architectural ornamentation ...