How many valence electrons does sodium have? How are sulfide minerals formed? What form is sodium found in at STP? What does sodium bicarbonate react with? How was einsteinium discovered? What is the atomic number of sodium chloride?
An atom that has an equal number of protons and electrons is neither positive nor negative -- it has no net charge. If that atom gains or loses electrons, however, it may become a cation, an ion with a positive charge, or an anion, an ion with a negative charge. Chemists use a ver...
In 1931, German chemist and physicist Erich Hückel proposed a rule todetermine if a planar ring molecule would have aromatic properties. This rule states that if a cyclic, planar molecule has 4n+2π electrons, it is aromatic. This rule would come to be known as Hückel's Rule. What is ...
How many valence electrons does it have? What is the charge of its stable ion? Draw the resonance forms for nitrogen dioxide monobromide, NO_2Br (N is central, the other atoms are bonded to it). (a) How many sigma bonds are there? How many pi bonds? (b) What is the nitrogen-...
In solution, the sodium and chlorine atoms separate to form sodium and chlorine ions, but the sodium valence electron stays with the chlorine atom. As a result, the sodium ion has a complete outermost electron shell of eight electrons and a positive charge of plus 1. The chlorine ion has ...
To comprehend how we can gain access to such precise numbers, we have to ask ourselves: how does a breathalyzer work? What do those figures mean? And how do police officers find out if someone they suspect has been drinking is actually legally drunk? Many officers in the field rely ...
How many electrons are in a double bond? How many total stereoisomers does the following molecule have? A carbon atom and a hydrogen atom form what type of bond in a molecule? What is the Lewis dot structure for CH4? What is the common name for ethanoic acid? What is a tetrahedral...
bacteria and viruses . lymphocytes continually pass back and forth between lymph tissue, lymph fluid and blood. when they are present in the blood, they stay for several hours. lymphocytes can live for weeks, months or years. there are many types of t cells that have specific functions, ...
to fool. the portable breathalyzer test has evolved the concept of tricking the breathalyzer test does have a basis in fact, though. old breathalyzers worked in a way that's similar to how many people seem to assume they still work, by measuring a chemical reaction based on the alcohol in...
electrons can transfer between them. This means an object cannot become positively charged unless another object becomes negatively charged; those electrons have to go somewhere. When you rubbed the ballon in your hair, electrons moved from the atoms in your hair into the atoms in the balloon, ...