76. Ga-69, because its atomic mass is closer to the atomic mass of gallium, than Ga-71…
I and II only 2. melts at 119 C ◦ 1 dewees (vd866) – Exam review – dewees – (24127) 8. None of these 007 10.0 points Which of the properties I) conductivity II) combustability III) hardness are chemical properties? 2 to identify a type of matter?…
* Be able to calculate the number of protons, neutrons and electrons given an element’s mass number or atomic number. If given this symbol - 4He – can you tell me how many neutrons and protons there are? If given this symbol 12Na – can you tell me how many neutrons and protons there are? Does this element exist?…
At least eight other researched physical and chemical properties of the element should be mentioned. These properties may include but are not limited to:…
1. Given any element and a periodic chart be able to determine the number of protons, neutrons and electrons, the atomic number and atomic weight, the number of valence electrons and the valence (missing number in valence shell)…
Elements are the building blocks of which all things are composed. The elements of Earth are made up of atoms. All atoms possess a nucleus of positively charged protons as wells and neutrons which are neutrally charged. Surrounding the nucleus is a low density area containing negatively charged electrons that are equal to the number of protons within the nucleus. The number of protons within an atom determines the element that it composes. Every element within the Periodic table is defined by its atomic number (the number of protons in the atom). Elements with an atomic number between 1 and 92 are naturally occurring elements. Every element with an atomic number higher than 92 (having a nucleus with more than 92 protons) is a synthetic (man-made) element. The larger the atomic number, the heavier the element.…
This was a hobby that David decided to take up and began finding tons of information relating to this topic. David found out different elements that are characterized further by the protons that are in their nuclei. Some examples of the way these elements are characterized are Carbon, Neon, and Sodium. Carbon contains six protons, therefore, the atomic number is six. Same with Neon and Sodium; Neon has ten protons and Sodium has eleven. Furthermore, Neon's atomic number is ten and Sodium's atomic number is eleven. He furthered in his research on this topic and learned that the atomic weight(atomic mass) is calculated by knowing the number of protons and neutrons put together.…
1. Draw an atom with an atomic number of 12. Label the protons, neutrons, and…
Helium is an element in the periodic table. It has the symbol He and an atomic number of 2. Its average atomic mass is about 4.002602 u. There are 7 known isoptopes of helium, bearing the electron configuration 1s2. The ionic radius of this element is 93 pm. Helium was first observed and found by French astronomer Pierre Jules César Janssen along with the scientist Joseph Norman Lockyer in 1868, adding one more element to the periodic table.…
2. Identify groups and sections of the periodic table by group name and common properties.…
6) Calculate the atomic mass of gallium if gallium has 2 naturally occurring isotopes with the following…
Despite the strong dominance of science in The Periodic Table, Primo Levi manages to write a compelling and moving novel about love and friendship, while simultaneously exploring the intricate world of chemistry. Friendship and chemistry? One might ask themselves what correlation these two contrasting, yet essential aspects of life might have between one another. Through complex chapters such as “Hydrogen”, “Iron”, and “Cerium”, it is revealed that the profound friendships one contructs, regardless of how momentary they might be, have the power to move hearts and touch lives. The elements of the Periodic Table are constantly forming bonds with one another, whether they are covalent,…
“Diet Coke does not contain nasty chemicals. It contains lovely and delicious carbonation, caffeine, and aspartame. What's unnatural about that?” Meg Cabot. This chapter was based on Power and Wealth. The article that I did my paper was about Aspartame. These two subjects connect because the individuals who drink the Diet Coke are getting fooled by the big companies that are selling it to them. The power elite are selling false hopes and false products, so people will buy their inventory, which in turn only profits the companies, and give them more substantial power. People in this country have strayed from what Mother Nature provides as sweet and delightful. The consumption of fruits was once gratifying enough to quench the curiosity of the sweet tooth without consequence. Nowadays people don’t have the time to eat organic foods and instead opted for the convenience of mass-produced, heavily processed and nutrient deprived fast foods and beverages. Most of these factory produced food products today are extremely sugary. That sugariness is a contributing factor to metabolic syndrome, diabetes, obesity and tooth decay. This all leads to one ingredient and that ingredient is artificial sweeteners.…
1) Overall, the physical properties of minerals provide a reliable means to identify common minerals. However, certain properties can exhibit a range of characteristics or values making them less useful for identification purposes. Choose three physical properties that might vary considerably between samples of the same mineral and explain why such variability might exist.…
1.1 There are many different reasons why people communicate in adult social care, as well as communication being between varieties of different people within this setting. For example, it could be conversation between support workers, support workers to managers or other health care professional and anyone communicating with service users including family. Communication can also come in many different forms such as verbal, non-verbal, body language and facial expressions as well as others. One main reason that people communicate is to interact with each other and relate to them on many different levels. Other main factors why people communicate are to make and develop relationships. Obtain and share information and also to receive support…