How many dots are shown in the electron dot diagram for calcium, element number 20?
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Related Questions
A material is ductile, conducts electricity, and is magnetic. The material is a _____. metal nonmetal metalloid impossible to tell
Describe 3 ways that you could change the rate of the reaction based on principles that effect rates of reactions.
What is one benefit associated with a nuclear fission reaction?(1) The products are not radioactive.(2) Stable isotopes are used as reactants.(3) There is no chance of biological exposure.(4) A large amount of energy is produced.
Calculate the volume a solution required toof provide the following: (a) 2.14 g of sodium chloridefrom a 0.270 M solution, (b) 4.30 g of ethanol from a1.50M solution, (c) 0.85 g of acetic acid (CH3COOH)from a 0.30 M solution.
b) oxygen
c) fluorine
d) nitrogen
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The atom which would be most likely to become a cation is; Choice A: Copper.
Discussion;
Among the options; Only Copper is a metal and as such, is capable of losing electrons in a bid to become a cation.
The other atoms on the other hand are electronegative and as such have high electron affinity as they can receive electrons to form anions.
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I have not learnt this in school yet, but I researched it, and this is what all the websites say.
Hope this helps!
What term is used to describe the lowest energy level of a particle? (5 points)
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Explanation:
Answer and Explanation: Photon is the basic unit of light. The excited state refers to the state when any specified electron gained some energy from surrounding. In the ground state, the electron carries no energy and this refers to its lowest energy level.
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not?
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The characteristics of the density we can find that the answer for the effect of sugar is;
- Densityincreases with increasing amount of sugar,
- The other costituents is not reaction with the sugar.
Density is the relationship between the mass and the volume of a body, this is a very useful relationship for fluid mechanics exercise.
Where ρ is the density, m the mass and V the volume
In this laboratory the liquid is possibly water since a solution is formed with the sugar, the volume of the solution does not change with the introduction of the solute (sugar), therefore the introduction of sugar creates a change in the mass of the solution.
Consequently, if the mass increases and the volume remains constant, the density should increase, possibly in a linear fashion with increasing mass.
The most important assumption is that the effect of the other ingredients of the drink is that it does not react with the sugar.
In conclusion using the density characteristics we find that the response for the sugar effect is;
- Density increases with increasing amount of sugar, assuming that there is no reaction between the sugar and the other constituents of the solution.
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Final answer:
The assumption is that other ingredients do not noticeably affect the density of the beverage, and changes in density are attributed solely to sugar content. The validity of this assumption would depend on various factors such as the densities and quantities of the other ingredients.
Explanation:
The assumption in this lab is that the other ingredients in the beverage do not significantly impact its density. This would imply that the changes in density observed are due solely to the sugar content. The validity of this assumption would depend on several factors. For instance, if the other elements are in relatively small quantities, or their densities are similar to that of the primary component (water in most beverages), the assumption may hold true. Nonetheless, it's important to point that this is an approximation, as in reality, every ingredient may contribute to the overall density.
Learn more about Density-Sugar Relationship here:
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slightly negative
slightly positive
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Explanation
In water molecule, there are 3 atoms which belonged to 2 elements. They are 2 Hatoms and 1 O atom. Oxygen atom is more electronegative than H atom. Hence,Oxygen atom in the water molecule gets a slightly negative chargeon it.
What is electronegativity?
Electronegativity is a value that tells us how an atom can attract electronstowards itself.
It helps us to tell the nature of molecule (as polar or non-polar) and thenature of the bond between atoms (as ionic or covalent).
If the electronegativity is high, then the attraction to the electrons is highunless the attraction to the electrons is low.
If the attraction towards electrons is high, then that atom gains a negativecharge on it.
Answer:
The correct answer is: B
Explanation:
slightly negative
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b. combine compounds to form elements.
c. are always covalent.
d. hold atoms together to form compounds.
. A pyramid of numbers differs from an ecological pyramid because it
a. shows the amount of energy within each trophic level.
b. displays the number of organisms at each trophic level.
c. is organized by trophic levels, while an ecological pyramid isn't.
d. attempts to describe a food chain or food web.
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Bio is not my strongest subject, but I am pretty sure that a pyramid of numbers differs from an ecological pyramid because it displays the number of organisms at each trophic level
D. displays the number of organisms at each trophic level.
Hope I was helpful :)