Although life elsewhere in the universe is probably based on carbon, some science fiction writers have speculated that it could be based on another element with similar bonding properties. which element do you think they choose?

Q: Is energy emitted or absorbed when the following electronictransitions occur in hydrogen? (a) from n…

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Q: Mention the main characteristics of the carbon family

A: Carbon family belong to 14 group Carbon family elements have variable physical and chemical…

Q: A chemical reaction occurs in three stages. Each stage consists of a mix of positively and…

A: We are given 8 different elements out of which only 3 are negatively charged elements.  Also given:…

Q: Lis) + % F21g) → LiFs) -594.1 kJ/mol (réaction globale) l'énergie de cohésion du réseau ionique ???…

A: The Born-Haber cycle for LiF is as follows:

Q: State whether the following statements are true or false.          Briefly explain your answer.…

A: X-rays True- The closer the electron passes by the nucleus, the higher will be the energy of the…

Q: Some scientists have suggested that life on other planets in the universe may be based on silicon…

A: Given: Some scientists have suggested that life on other planets in the universe may be based on…

Q: Which of the following are antimicrobial halogens?(a) Iodine (d) Iodophores (c) Bromine(d) Chlorine…

A: Halogens It consists of group 17 elements that are nonmetals. They form anions by accepting…

Q: A period 3 element with an equal number of nucleons

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Q: How many nucleons are there im  40^Ca

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles…

Q: True or False (use your periodic table/data sheet when appropriate) a. A Geiger counter detects…

A: a. True. A GM counter detects radiation from flashes of light generated by phosphors. b. True.…

Q: Where do free radicals come from? What harm do they do?How is the body protected from free radicals?

A: Free radicals are produced in three main ways: - 1. Metabolic reactions: - The normal chemical…

Q: What do 14C+ , 15N, and 17F-  have in common?     the same number of electrons     the same…

A: no of electron 14C+=

Q: If an element of group I-A joins with an element of group VI-A, what type of bond is formed? Why?

A: In this question, we will discuss about type bond bond when two elements are joined from different…

Q: How are Deuterium and tritium are useful/

A: Deuterium and tritium both are isotopes of element hydrogen. Furthermore, deuterium has atomic mass…

Q: find the atomic spacing in a crystal of rock salt (nacl), whose structure is shown in fig. 2.19. the…

A: Given, Mass of Na = 3.82 x 10-26 kg Mass of Cl =  5.89 x 10-26 kg Then mass of NaCl =…

Q: What is the atomic mass of C₂H10ON2? O 64.108amu O 73.075amu 78.115amu O 66.104amu

A: Given, Atomic mass of C2H10ON2 = ? Note: Atomic mass of C = 12.011 amu Atomic mass of H = 1.00784…

Q: What are the names and atomic masses of rhodium (Rh) and niobium (Nb)?

A: The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass…

Q: Why is carbon considered the element of Life? What makes carbon unique? Can you think of something…

A: Given statements,    Carbon considered the element of Life    Unique property of Carbon    Something…

Q: Radioisotopes are used in   LEDs   some food preservation processes   some glow-in-the-dark paints…

A: Radioisotopes are the unstable form of an element that emit radiation to transform into a more…

Q: Why would you say that Space Shuttles rather use hydrogen as its primary fuel source?

A: The Space Shuttle was a partially reusable low earth orbital spacecraft system.  It is operated by…

Q: How is iodine classified?

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles…

Q: Mercury has six isotopes with significant natural abundance: 198Hg (10.0%), 199Hg (16.9%), 200Hg…

A: Isotopes are elements with same atomic number but different mass numbers. Almost all elements have…

Q: how to correlate the size of an atom with its chemical reactivity?

A: The size of atom is the distance between the center of nucleus and the valence electron.  The size…

Q: What kind of neuclear reaction does the picture show?

A: Nuclear chemistry is branch of chemistry in which we deal with nuclear fusion and fission reaction.

Q: D. Choose and draw the elements that will be characters of your cartoons. Show how these elements…

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Q: What is radioactivity? Indicate whether you agree or disagree with the following statement and…

A: Radioactivity is a physical phenomenon  where an element or isotopes emitting radiation…

Q: 8. What is a real life example of homogenous nucleation? Why do you think that it is this type of…

A: A question based on properties of liquids that is to be accomplished.

Q: What are the structure and chemistry of nuclectides?

A: What are the structure and chemistry of nuclectides.,

Q: What is the name of John dalton’s theory

A: The correct answer is given below

Q: can someone explain question 7？ Why As3- become a Ar？？？

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Q: What charge would exist on chlorine (#17) after it reacts with a rubidium atom (#37)?

A: We would check electronegativity values of determine the charge.

Q: Using a periodic table complete the following Big Bang Nucleosynthesis Reactions. a. p + b. 2H +p →…

A: NUCLEOSYNTHESIS The process by which a nucleon (protons+neutrons ) forms new nuclei. There are two…

Q: 7. What do the study findings suggest to us about our overall question, "How should we search for…

A: For life on earth depends six elements : carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfur.…

Q: What do 14C+ , 15N, and 17F-  have in common?     the same number of protons     the same number…

A:

Q: Physical properties of ( Carbon-11

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Q: 11. How could we find whether there are substances that could support life on other planets?

A: The detailed solution of your question given below-- Since, we are mostly live in earth and know…

Q: Explain how carbon-12, carbon-14 , and nitrogen-14 would be different at an atomic level. B

A: In the given question we have to differentiate the different atom and it's isotope. In the carbon-12…

Q: Isotopes can be used in studies of metabolic pathways because Their half-like sulfur allows a…

A: Radioctive isotopes which includes isotopes of sulfur , carbon   , deuterium  atom Location or…

Q: The following table gives numbers of electrons, protons, and neutrons in atoms or ions of a number…

A: An element's fundamental unit is the atom. An atom is a unit of matter that cannot be broken down…

Q: What is the reason why carbon is considered a unique element Carbon has two stable isotopes, carbon…

A: Reason why carbon is considered a unique element- Carbon is unique among all the elements because it…

Q: 2. A certain OTC antacid contains 800 mg of calcium carbonate (CaCO3) per tablet. How many mEq of…

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Q: To produce 130 g of CeH12O6 , how many kJ of energy would you need based on the reaction above? Show…

A: 6 moles of CO2(g) reacts with 6 moles of H2O(l) using 2800 kJ of energy to produce 1 mole of C6H12O6…

Q: Silver ions are classified as a heavy metal, while sodium ions are not.  Using this information,…

A: Heavy metals are metals that have relatively high densities, atomic weights, or atomic numbers. The…

Q: X-rays over dose very dangerous because the interaction causes ionization of atom a, B and y…

A: 1) We say that x-rays are "ionizing rays" meaning that they have the unique capability to remove…