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If you take millions of tons of metal off the earth in the form of satellites therefore reducing earth's specific mass, would this in turn affect the earth's orbit around the sun?
Our estimates are from scientific computation. The precision (the number of correct significant digits (sd), in scientific notation) cannot be more than the smallest among the sd in the...
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An element has three naturally occurring isotopes with the following masses and abundances. How do you calculate the atomic mass of this element? What is the identity of the element?
The atomic mass is the weighted average of the atomic masses of each isotope. In a weighted average, we multiply each value by a number representing its relative importance. In...
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What the symbol for an element that is an alkali metal?
The Alkali metals all reside in the far left 'group' (Group 1) of and are as follows; Li (Lithium) Na (Sodium) K (Potassium) Rb (Rubidium) Cs (Cesium) Fr (Francium)
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The properties listed in which option is NOT necessarily consistent with those of an alkaline earth metal? $"A. Forms a salt with TWO equivs of halide."$
$"B. Forms a simple binary oxide."$
$"C. React with water to give dihydrogen."$
$"D.Are ductile"$
By definition, ALL metals are malleable and ductile, and so this property is not restricted to the Group 2 metals. (Ductility is the ability of a metal to be drawn...
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The atomic mass of element A is 63.6 atomic mass units. The only naturally occurring isotopes of element A are A-63 and A-65. What is the percent abundance in a naturally occurring sample of element A closest to?
The average isotopic mass is the weighted average of the mass of the individual . Because the quoted average, $63.6$ $"amu"$, is closer to $""^63A$ than $""^65A$, the $""^63A$...
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Suppose element X is a poor conductor of electricity and breaks when hit with a hammer. Element Z is a good conductor of electricity and heat. In what area of the periodic table does each element most likely belong?
Metals are good conductors of electricity and heat. the text doesen't tell anymore and Z may be one of abaut 90 known metals, in the left area of . X,...
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Why IA group elements are called alkali metals and IIA group are called alkaline earth metal?? Thanks a lot .
The realization that earths were in fact oxides was attributed to Lavoisier. And the Group 2 metals form a stable series of sparingly soluble binary oxides. I am told that...
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Do ionic bonds occur between metal and non-metal ions, non-metal and non-metal ions, or metal and metal ions?
Ionic bonds occur between anions and cations. And cations may be metallic, i.e., $M^(2+)$, or they may be non-metallic, i.e. ammonium salts, $NH_4^+$. And anions, while typically non-metallic, i.e. $X^-$...
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A particular element is located in column IVA of the periodic table. How many dots would be placed around the symbol of this element in its electron dot notation?
Column IVA is group 14 on . The in group 14 all have 4 , so the Lewis symbol for elements in this group have 4 dots around them (each...
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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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