Periodic Table

The element carbon has the ability to link with itself in long chains containing from two up to hundreds of units. It can also form rings and bond with many other elements and they often with each other. This ability means that many millions of possible compounds can be formulated. The chemistry of carbon is called organic chemistry as life is based upon it.

The atomic number of F is 9, Na is 11, so F (9) + Na (11) = 20. The element with an atomic number of 20 is calcium (Ca).

metals

Metals:Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium Rhodium, Palladium, Silver, Cadmium, Lanthanu, Hafnium, Tantalum, Tungste, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Actinium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Cerium, Praseodymiu, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium

Hydrogen is placed in group 1 because it has an electron configuration of 1s1, like other group 1 elements. While hydrogen can sometimes exhibit properties of a halogen, it predominantly displays characteristics of a group 1 element due to its electronic structure and chemical behavior.

Protons = Atomic Number

Electrons = Atomic Number

Neutrons = Atomic Mass - Atomic Number

*A note on Atomic Mass*

Atomic Mass is the sum of the number of protons and neutrons in an atom. Every time you remove or add a Proton/Electron or a Neutron, you change the mass by one.

*A note on Protons and Electrons*

The number of Protons and Electrons in an atom is always the same. Whenever you talk about adding/removing a proton or an electron, you are by default adding/removing one of the other as well.

A non-metal element can achieve a stable electron-shell structure like that of noble gases by gaining or losing electrons to complete its outer electron shell. This can be done through forming ions or sharing electrons with other atoms to attain a full valence shell, which is similar to the configuration of noble gases.

The properties of alkali earth metals and alkaline metals want to give up or share their valence electrons when bonding with a non-metal or polyatomic ion. For example, Sodium (Na) has a single valence electron, and if it bonds with Chlorine (Cl) which has seven valence electrons, Sodium would give up and share it's electron with Chlorine. Because an electron is negatively charged, and a proton, inside the nucleus, is positively charged, the Sodium atom has one less negative charge, and one more positive charge, rendering the ionic charge no longer neutral but +1. This is why metals are able to form cations.

Metalloids, also known as semi-metals or semiconductors, are the elements that border the zig-zag line on the periodic table running from aluminum to ununoctium. These elements have properties that are intermediate between metals and nonmetals.

Beryllium has the lowest atomic mass in group 2 of the periodic table.

Group 1 elements on the periodic table, such as hydrogen and lithium, are generally not stable in their elemental form because they are highly reactive due to possessing only one electron in their outer shell. They readily react with other elements to achieve a stable electron configuration.

The unique light emission patterns of elements, known as their atomic spectra, can provide valuable information to scientists. By studying these spectra, scientists can identify elements present in a sample, determine their concentrations, and even understand the chemical and physical properties of the material under study. This information is used in various fields such as astronomy, environmental science, and materials science.

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.