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In an atom, there are several energy levels. However, within each energy level there are subshells. The first row of the Periodic Table (PT) has one energy level. The second row has two energy levels, and the second row has two subshells. The third row of the PT has three energy levels; the third energy level has three subshells. The outer subshell is called the valence shell, and it holds valence electrons.
The first energy level can hold a maximum of two valence electrons. The second valence shell can hold 8 valence electrons. The third valence shell can hold 18. Past four the numbers get big, so we will not go there. The number of electrons that fill the valence shells determines reactivity. The Alkali Metals (first column) only need to give away 1 valence electron. The Halogens (second-to-last column) only need one to fill their outer shells. Put a Halogen and an Alkali Metal together and they will violently react in order to fill their valence shells. Atoms, in a reaction, are sharing electrons with other atoms.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoThe are rearranged to form new products, but the ultimate goal of any reaction is to achieve equilibrium.
Wiki User
∙ 11y agoTo be balanced
Wiki User
∙ 11y agoTo have 8 electrons.
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the atom
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Are most chemical reactions at equilibrium in living cells?
No because A chemical reaction that is at equilibrium in living cells is not capable of doing any work
Are all atoms present at the start of a reaction are present at the end?
The types and numbers of atoms at the end of a reaction are the same as before the reaction.
What are the new substances formed in a chemical reaction called?
The substance that is created is called a product.
What is the effect of cutting one single strip of magnesium into more than one when doing a chemical reaction?
The surface area of the magnesium is increased. The reaction will be larger, but normally will take less time.
Who is chemical neutralized caustic soda?
A strong acid would do. We will show sulfuric acid doing this. 2NaOH + H2SO4 -> Na2SO4 + 2H2O The reaction produces a slat, sodium sulfate, and water and is called a neutralization reaction.
Can the production of new atoms occur doing a chemical reaction?
No, it is not possible; we need nuclear reactions for this.
Is Chlorine atoms stealing oxygen atoms from the ozone layer a physical or chemical change?
Chlorine is doing it chemically. It reacts with it.
When a nail is bent when hammered is it a chemical or physical reaction?
It is a physical reaction, this is because the nail is physically doing something
Table salt is formed when the of sodium and chlorine combine?
when the (molecules) of ... When the atoms of sodium and chlorine combine to form NaCl or the salt molecule,it forms a harmless chemical reaction. we are doing it in my science class..... im confused to.
What is the chemical reaction between sodium acetate and sodium hydroxide?
There is no reaction between them: They only 'could exchange' the H+ and Na+ ions but the products are identical to the reactants.CH3COOH + CH3COONa --> CH3COONa + CH3COOH
When do the atoms of one element break down to form atoms of another element?
changing elements involves changing the number of protons, so you'll be doing some kind of radioactive decay or nuclear fusion/fission; not any ordinary chemical reaction
Are most chemical reactions at equilibrium in living cells?
No because A chemical reaction that is at equilibrium in living cells is not capable of doing any work
How many elements are there in bill nye the science guy chemical reactions?
It depends on which reaction he is doing - be more specific
Enzymes increase the rate of a reaction by doing what?
An enzyme is a catalyst that speeds up a chemical reaction. It functions by lowering the activation energy required for a reaction to occur, and by reducing the activation energy, the reaction speeds up.
What is the relationship between a Chemical reaction and a chemical equation?
The chemical equation demonstrates the ratio of chemicals reacting and producing. Even though only minute amount of actual chemicals are reacting, the chemical equation shows which chemicals are doing what.
What are some examples of chemical and physical changes that a kid can do?
physical: play with a clay and change the shape of the clay. tear a paper chemical: while doing brush, a chemical reaction is taking place bursting crackers
Are all atoms present at the start of a reaction are present at the end?
The types and numbers of atoms at the end of a reaction are the same as before the reaction.
