Francium Is The Most Reactive Metal Essay

For the lesson observed the objectives was to explain the trends of the periodic table based on the elements’ valence electrons and atomic numbers. Additionally, students were responsible for applying their previous knowledge in calculating subatomic particles to review the Bohr Models and discus the relationship among families in the periodic table. Students will use the information from today’s lesson to make future judgments on reactivity and bonding created during chemical reactions in the next unit. Lastly, students were to connect the information on elemental properties to previous experiences with their health, commercial products, and everyday life.

Is the recycling of electronics (e.g. mobile phones) a more economically viable method of sourcing rare earth metals than mining?

Bariums reactions are with: chalcogens, and oxygen or air occurs at room temperature. Somehow barium is scientifically stored under oil or it is stored in an alert atmosphere. The following are nonmetal that barium reacts with: carbon, nitrogen, phosphorus, silicon, and hydrogen. Barium is very exothermic and it needs to proceed upon heating so I won’t explode or cause hazardous chemical problems. Barium’s reaction with water and alcohol happen to be very exothermic and happens to release hydrogen gas. The following are elements that barium combines with: aluminum, zinc, lead, and tin. With these combinations they end up forming intermetallic phases and alloys. Barium that was founded in the earth’s crust is a mixture of seven primordial nuclides which are: barium-130, 132, and 134 through 138. Barium-132 happens to decay similarly like xenon-132, with half- lives a thousand times greater than the age of the universe. Radioactivity of these types of isotopes is so weak that it amazingly proposes no certain or complete danger to

The students created a macroscopic, three-dimensional (3D) model of several properties of the periodic table. They explained in their own words the following terms: atomic radii, ionic radii, first ionization energy, and electronegativity. Lastly, they identified, described, and explained the patterns observed in the 3D periodic tables for the following element properties: atomic radii, ionic radii, first ionization energy, and electronegativity.

A radioactive element does not have any stable isotopes, which means it may spontaneously degenerate, emitting alpha particles, beta particles and occasionally gamma rays. Some examples of radioactive elements are uranium, promethium and curium. Radioactive elements could be used either negative or positive.

As more electrons are added the distance will increase which cause atomic radius to change.

Due to these factors, this graduate student supplies a rating of ‘3’ concerning this element.

Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.

The periodic table contains one hundred and 118 elements. These elements range from some of the most known, such as oxygen, to some of the most unknown, protactinium. Out of these 118 element I think the most important one is sodium(Na). Sodium is is a soft metal at room temperature and is in the first group, which are the Alkali Metals (1). It’s atomic number is eleven and it is in the third period on the periodic table (1). Sodium is used in many different compounds such as sodium chloride, sodium carbonate, and sodium hydroxide. Sodium does a great deal of things like salt our food, maintain our health, and stabilize water. These are just a few of the examples why sodium is the most important element.

Every element is valuable and unique due to the endless arrangements of sub-atomic particles, which fascinates me. This allows for a diversity of elemental properties, sparking innovation for chemists to develop new products from different tasting chocolates to materials used for rockets- shaping society and the environment of the modern world. The sheer range of applications where chemistry is involved inspires me to contribute, while learning, unlocking why everything behaves the way it does.

(1) Lanthanides are extremely interesting, and sometimes rather difficult to study. “Their buried electrons cause the lanthanides to clump together in frustrating ways.” (4) Despite their faults, life as it is today would not be the same without them. Although called a “rare-earth” element, in truth, lanthanum is the 28th most abundant, being as common as lead and tin together. (1) In fact, currently known reserves of lanthanum are known to be around 6 million tonnes. (1) (A tonne, also known as a metric ton, is a unit of mass equaling 1,000 kilograms. (5) According to Emesly, although there are no ores which contain only lanthanum as the metal component; it is found in minerals that include all the other rare-earth elements. Rare-earth ores actually contain a lot of lanthanum; monazite has around 25% lanthanum.  Interestingly, the metal itself is obtained by the reaction of lanthanum fluoride and calcium metal. Lanthanum metal is silvery-white, soft enough to cut with a knife, tarnishes rapidly in air, and burns easily if ignited. It is also one of the most reactive of the rare-earth metals; it even reacts with water, releasing hydrogen gas. Lanthanum has an extremely high melting point of 921 degrees Celsius and an even higher boiling point of 3,460 degrees Celsius. Additionally, it has a density of 6.1 kg per liter (6.1g per cubic centimeter)

The element francium is also presumed to be extremely reactive to water. Francium’s relatives in group one react violently to water, increasing in strength the more you go down the group. Lithium at the top of the group only fizzles when dropped in water while cesium, the element above francium, explodes when touched by water. Sadly, nobody has been able to see what francium dropped in water looks like.

The second most important piece of information taken from Figure 1 is the number of protons in the model. The number of protons corresponds to the atomic number, which can be found on the Periodic Table. Chlorine has a total of 17 protons, so there are 17 protons drawn on the Bohr model. From the inside out, the number of electrons drawn on each shell are 2, 8 and 7. The third piece of information taken from Figure 1 is that Chlorine has a total of 18 electrons. This means that there is one more electron than there is protons. Because of this, chlorine becomes a negatively charged atom. Chlorine desperately wants another electron to fill its outer shell, so it bonds very nicely with atoms in which it can share an electron with. Chlorine has the ability to create many ions because of its need for another electron to become stable. The molecular structure of chlorine is important to understand. The Bohr model of chlorine helps to understand why chlorine reacts the way it does with other elements. Without the knowledge of what chlorine can work with and what it cannot, it is now possible to create medications in order to treat medical disorders. Knowing the facts of the molecular structure take away guess work and thus speed up the process of medical

Group 1- hydrogen: lightest element on the periodic table. lithium: lithium never occurs freely in nature. sodium:Sodium is the sixth most abundant element in the Earth's crust,. potassium:Potassium ions are necessary for the function of all living cells. rubidium: Rubidium has also been reported to ignite spontaneously in air. caesium:the element is only mildly toxic, it is a hazardous material as a metal and its radioisotopes present a high health risk if released into the environment. francium:Francium is the most unstable of the naturally occurring elements

We can find potassium when we look at the periodic table. __Potassium__ is an element that has the symbol “K”, and it is an __alkali metal__, which is a highly reactive substance. The appearance of potassium can be described as a silvery-white solid.