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Group 18 rarely combines with other elements. They are the "loners" or noble gases. Why do these elements not need to bond with other elements?
The main reason the noble gases do not need to bond with other is that their outermost subshells are filled. These are known as . Take helium for example. It...
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Which elements form diatomic molecules?
And the chalcogens........Group 16, and of course hydrogen.... Most elemental gases, save for the Noble Gases, are DIATOMIC. Lithium, beryllium, and carbon, form diatomic molecules that have spectroscopically observed.
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A sample of element X contains 100 atoms with a mass of 12.00 and 10 atoms with a mass of 14.00. What is the average atomic mass (in amu) of element X?
The average of an element is calculated by taking the weighted average of the atomic masses of its stable . In other words, each stable isotope will contribute to...
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What symbols are used to represent the charges on atoms in a polar covalent bond? The polarity of the bond? boble type of bond?
Where the $delta$ symbol denotes a little bit of (or partial) positive or negative charge. Dipoles are drawn from positive to negative. The overall dipole moment is the vector sum...
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The Cl-Cl bond energy is 243 kJ/mol. Therefore the formation of a single bond between chlorine atoms ?
A) should require the absorption of 243 kJ per mole of $Cl_2$ formed.
B) should result in the release of 243 kJ per mole of $Cl_2$ formed.
The bond energy, or bond , expresses the energy needed to break a chemical bond, that's why it will always be listed as a positive value. In your case, 243...
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What is the relationship between diatomic molecules and diatomic elements?
Every molecule that consists of two atoms is diatomic. Only if the two atoms are the same there is a diatomic element. So $O_2$ is a diatomic element (and thus...
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What is a reaction in which the atoms of element replace the atoms of a second element?
For , the atoms are rearranged so that an element replaces an element in the compound. It usually looks somewhat like this: $AB+C -> AC+B$
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Weight of 50 atoms of an element is 3000 a.m.u. Calculate the number of atoms in 240 grams of element?
$"Mass of 1 atom" = 1 color(red)(cancel(color(black)("atom"))) × "3000 u"/(50 color(red)(cancel(color(black)("atoms")))) = "60.0 u"$ $"Mass of 1 mol of atoms = 60.0 g"$ $"Number of moles" = 240 color(red)(cancel(color(black)("g"))) ×...
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Which option contains a $2*g$ mass of sodium atoms....
$1.$ $5.24xx10^22*"sodium atoms?"$
$2.$ $6.022xx10^24*"sodium atoms?"$
$3.$ $3.12xx10^23*"sodium atoms?"$
$4.$ $5.24xx10^22*"sodium atoms?"$
We know that $1*mol$ contains $6.022xx10^23$ individual sodium atoms, and has a mass of $22.99*g$. And thus for $1.$ there is a $2*g$ mass of $Na$. For $2.$ there is...
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A compound is broken down into 34.5 g of element A, 18.2 g of element B, and 2.6 g of element C. What is the percent (by mass) of each element?
$%A$ $=$ $(34.5*g)/(34.5*g+18.2*g+2.6*g)xx100%=62.3%$ $%B$ $=$ $(18.2*g)/(34.5*g+18.2*g+2.6*g)xx100%=33.0%$ $%C$ $=$ $(2.6*g)/(34.5*g+18.2*g+2.6*g)xx100%=4.70%$ That is $%" element"$ $=$ $"Mass of element"/"Mass of compound"xx100%$ $"Mass of compound"$ is clearly the SUM of the constituent ....
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