Periodic Table

If Dalton's theory had been correct in the gold foil experiment, all the alpha particles would have passed straight through the gold foil with little to no deflection. Dalton's theory proposed that atoms were indivisible and uniform in structure, so there would have been no interactions with the densely packed positive nucleus within the gold atoms.

The codes on the periodic table that represent an element are called element symbols. These symbols are typically one or two letters that represent the element's name, often derived from the element's English or Latin name.

A thermometer typically contains a temperature sensor (e.g., mercury, alcohol, or a digital sensor), a scale for measurement (e.g., Celsius or Fahrenheit), and a casing to protect the sensor and display the temperature reading.

Oxygen has less ionization enthalpy than fluorine because oxygen has a smaller nuclear charge compared to fluorine, leading to weaker attraction between the nucleus and the electrons. This makes it easier to remove an electron from an oxygen atom compared to a fluorine atom.

Scientists call columns on the periodic table "groups" or "families." These columns contain elements with similar chemical properties due to their shared number of valence electrons.

Radon-198 does not decay via beta decay. It is thought to decay by alpha decay, but that is not certain. The equation would be ...

86198Rn -> (Alpha, T1/2 = 86 ms) -> 84194Po + 24He2+

The element on period 3 group 13 of the periodic table is aluminum (Al). It is a lightweight metal that is commonly used in various industries due to its properties such as low density and high strength.

They relate to the sub orbital type, or the highest energy orbitals that are occupied in a given element that falls under the subsequent block of the periodic table.

Plato: Its not D. none of the above

The development of the atomic theory involved continuous testing, revision, and refinement of ideas based on new evidence. It exemplifies the iterative and self-correcting nature of science, where theories evolve in response to data and experimentation. Additionally, the atomic theory influenced other scientific disciplines and technologies, showcasing how scientific knowledge can have far-reaching impacts.

Radium (atomic no. 88): Group 2 (Alkaline Earth Metals), period 7 of the periodic table of elements.

The fact that you think there's a funny joke about carbon in the first place.

The atomic number is the number of protons in the atom. The number of protons is what determines the element the atom is. This makes the atomic number very important in determining what the atom is.

You can't buy radon. Its half life is too short (3.8 days). If you managed to isolate a few grams of it it would effectively all have radioactively decayed within a month - you'd have only about 0.1% of what you started with left.

Mendeleev's periodic table arranged elements by increasing atomic mass and grouped elements with similar properties together. Today's periodic table is similar, but it is arranged by increasing atomic number, which reflects the number of protons in an atom's nucleus. Both tables also show periodic trends in properties as you move across and down the table.

In the phrase "on top of the table," "on top" is a prepositional phrase acting as an adverb, providing more information about where the action is happening. It is not the main subject or verb of the sentence. The main subject is usually the noun or pronoun that the sentence is about.

The atoms of the elements in Group 13 (IIIA), the boron group, have three valence electrons, all of which are unpaired. The atoms of the elements in Group 15 (VA), the nitrogen group, have five valence electrons, three of which are unpaired.

A group of soldiers is known as a platoon when it consists of 15-30 soldiers, a company when it consists of 80-250 soldiers, and a battalion when it consists of around 300-1,200 soldiers.

Yes, elements are arranged in the periodic table according to blocks that correspond to the orbitals being filled. For example, the s-block elements fill the s-orbital, the p-block elements fill the p-orbital, the d-block elements fill the d-orbital, and the f-block elements fill the f-orbital. This organization provides a structured way to represent the electron configurations of elements.

Yes, a cation and an anion can be isoelectronic if they have the same number of electrons. For example, in the third period of the periodic table, a sodium cation (Na+) and a fluorine anion (F-) are isoelectronic because they both have 10 electrons.

Su is not an abbreviation used in the periodic table of elements. The symbols on the periodic table represent individual elements and their chemical properties. If you are referring to another symbol or element, please provide more information for clarification.

Scientists in 1750 did not have access to the vast amount of experimental data on elements that Mendeleev had. The understanding of atomic theory, periodic trends, and chemical behavior was not advanced enough at that time to support the development of a table like Mendeleev's. Additionally, the technology and resources needed to collaborate and disseminate scientific information were also lacking in 1750.

carbon is an element ..

but it has a self linking property wherein more than one carbon atoms link together to form a molecule

Mendeleev proposed that there must be missing elements, to which he gave the provisional names Ekaboron, Ekaaluminum and Ekasilicon. Scankium, Gallium and Germanpoop were discovered in 1879, 1875 and 1886, respectively, with properties very close to those predicted by Mendeleev. hey Glen

Alkali metals react faster than alkaline earth metals due to their lower ionization energy and higher reactivity. Alkali metals readily lose their outermost electron to form a +1 cation, making them highly reactive with water and air. Alkaline earth metals, on the other hand, are less reactive as they have higher ionization energies and require more energy to lose their outer electron.

Mendeleev placed arsenic and selenium on the periodic table based on their chemical properties and atomic masses. He arranged elements by increasing atomic mass and grouped them by similar properties. By doing so, he could predict the properties of undiscovered elements and fill in gaps in the periodic table.