science periodic table

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Questions and Answers

¿Qué es la Estadística Descriptiva?

Es una rama de la estadística que se dedica a recopilar, organizar, resumir y presentar datos de manera informativa.

¿Cuál no es una función principal de la Estadística Descriptiva?

  • Inferencia estadística (correct)
  • Recopilación de Datos
  • Presentación de Datos
  • Organización de Datos

¿Qué son los datos cualitativos?

Expresan cualidades o atributos.

¿Qué son los datos cuantitativos?

<p>Expresan cantidades numéricas.</p> Signup and view all the answers

¿Cómo se calcula la Media Aritmética?

<p>$ = \frac{\sum_{i=1}^{n} x_i}{n}$</p> Signup and view all the answers

¿Qué es la Mediana?

<p>Es el valor central de los datos ordenados.</p> Signup and view all the answers

¿Qué medida estadística se usa para describir la variabilidad de un conjunto de datos?

<p>Varianza (B)</p> Signup and view all the answers

El rango se calcula como la diferencia entre el valor máximo y el valor _____

<p>mínimo</p> Signup and view all the answers

¿Qué es un gráfico de barras?

<p>Es una representación gráfica que compara las frecuencias de diferentes categorías.</p> Signup and view all the answers

¿Cuáles son las aplicaciones de la Estadística Descriptiva?

<p>Investigación de mercado, control de calidad, salud pública, ciencias sociales.</p> Signup and view all the answers

El primer paso del proceso estadístico descriptivo es definir el _____

<p>problema</p> Signup and view all the answers

Flashcards

Radioactive elements

Elements with unstable nuclei that undergo radioactive decay.

Radioactive decay

The process where a nucleus emits particles and high-energy radiation.

Types of radiation

Alpha particles, beta particles, and gamma rays.

Actinides

Elements that are all radioactive and unstable, including Uranium and Plutonium.

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Uranium (U)

Most stable actinide, used as nuclear fuel.

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Plutonium (Pu)

Used in nuclear weapons and space exploration.

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Lanthanides

Group of 15 chemically similar and reactive elements also known as 'Rare Earth Elements'.

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Rare Earth Elements (REEs)

Elements with similar properties used in electronics and magnets, despite their name, are abundant.

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Rare earth elements in group 3

Scandium (Sc) and Yttrium (Y).

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Study Notes

Radioactive Elements

  • Radioactive elements have unstable nuclei and undergo radioactive decay
  • Radioactive decay involves the nucleus giving off particles and high-energy radiation
  • Atoms transform into different elements when particles and energy are released
  • Alpha particles, beta particles, and gamma rays (high energy radiation) are the three types of radiation emitted during radioactive decay
  • Some radioactive elements occur naturally, while others are synthetic

Actinides

  • All actinides are radioactive and unstable
  • Uranium (U) and plutonium (Pu) are the most well-known actinides
  • Uranium (U) is the most stable actinide
  • Uranium (U) is used as fuel for nuclear power plants and nuclear weapons
  • Plutonium (Pu) is used in nuclear weapons and to power space exploration equipment

Lanthanides

  • Lanthanides are known for their similarities
  • There are 15 lanthanides and they are reactive
  • Lanthanides are also called "Rare Earth Elements" (REEs)
  • Rare earth elements are difficult and expensive to mine and extract from rock (ores), despite their name
  • Scandium (Sc) and yttrium (Y), found in group 3, are also considered rare earth elements
  • Rare earth elements are crucial components in many electronic devices
  • Rare earth elements are used to manufacture permanent magnets for electronics such as cell phones, televisions, computers, automobiles, wind turbines, and jet aircraft

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