An aromatic compound where one or more of the carbon atoms are been replaced with an atom other than carbon

What is an aromatic heterocycle? More test answers on https://studyhippo.com/aromaticity-benzene-pyridine-and-pyrrole/

Considering how small atoms are, what are the chances that at least one of the atoms exhaled in your first breath will be in your last breath?

VERY PROBABLE because of how incredibly small atoms are More test answers on https://studyhippo.com/final-ch-12-31350/

Which statement about the four quantum numbers which describe electrons in atoms is INCORRECT

L= subsidiary (or azimuthal) quantum number, l=1,2,3…, (n+1) More test answers on https://studyhippo.com/inorganic-chemistry-8-8/

Which of the following bonds can form between atoms of equal electronegativity?

Van der Waals interactions can form between atoms of equal electronegativity. More test answers on https://studyhippo.com/mastering-biology-chapter-2/

What environmental condition had to change before subatomic particles could come together and form the first atoms after the Big Bang?

Temperature had to decrease so the subatomic particles could join into an atom More test answers on https://studyhippo.com/geology-101-finals-study-221754/

If an atoms mass is 100 and it has 55 protons how many electrons are in a neutral atom

55 electrons ; the number of electrons must match the number of protons in a neutral atom More test answers on https://studyhippo.com/atomic-structure-and-nuclear-equations/

How is the number of valence electrons in carbon atoms related to the bonds that carbon atoms form?

because carbon has four valence electrons, a carbon atom always forms four covalent bonds. More test answers on https://studyhippo.com/chapter-22-hydrocarbon-compounds-19268/

How are the Fe-S centers usually attached to proteins? How many Fe atoms can be contained?

Fe-S centers are attached to proteins via cysteine residues, and contain 1-4 Fe atoms (non-heme Fe) More test answers on https://studyhippo.com/biochemistry-2-electron-transport-chain-and-oxidative-phosphorylation/

Among atoms with low atomic numbers, what is the neutron-proton ratio of the most stable nuclei?

0,042361111 More test answers on https://studyhippo.com/chemistry-4/

What is the number of carbon atoms in 3-methyl 1-pentanol?

6. 1 in methyl and 5 in pentanol More test answers on https://studyhippo.com/chapter-13-chem-2/

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Atoms Flashcards, test questions and answers

Discover flashcards, test exam answers, and assignments to help you learn more about Atoms and other subjects. Don’t miss the chance to use them for more effective college education. Use our database of questions and answers on Atoms and get quick solutions for your test.

What is Atoms?

Atoms are the building blocks of all matter, and they have fascinated scientists since their discovery. An atom is composed of a nucleus which contains protons and neutrons, surrounded by electrons orbiting in shells or energy levels. The number of protons determines an element’s identity for example, hydrogen has one proton and oxygen has eight. Atoms may bond together to form molecules or interact with other atoms in chemical reactions. Atomic theory originated in ancient Greek times when philosophers attempted to explain the structure of matter. In the 19th century John Dalton proposed his atomic theory that states atoms are indivisible particles that make up all substances; however, this idea was largely rejected at first until further evidence led to its acceptance around 1860s. Since then it was amended several times as new information became available. Today we use atomic theory to understand many aspects of chemistry such as stoichiometry (the study of how elements combine), kinetics (the study of reaction rates) and thermodynamics (the study of energy changes). Atomic Theory also informs us about atomic structure and enables us to predict properties like boiling points for different elements, radioactivity, isotopes etc.. Nuclear power plants use nuclear fission reactions based on Einstein’s famous equation E=mc2 which showed how mass can be converted into energy through splitting atoms apart. Thanks to advances in technology over the last few decades quantum mechanics allow us to probe even deeper into the inner workings of an atom such as determining electron configurations around nuclei using lasers or magnetic fields. This has proven invaluable for understanding areas like catalysis where we need detailed knowledge about how chemicals interact with each other at an atomic level.