Na:-
Sodium has 11 electrons so the EC followed by
[tex]\\ \sf\Rrightarrow 1s^22s^22p^63s^1[/tex]
Ca:-
Calcium has 20electrons so the EC followed by
[tex]\\ \sf\Rrightarrow 1s^22s^22p^63s^23p^63d^2[/tex]
Please help me answer this question
Answer:
d=m/v d=0.94
Explanation:
^^^^^^&&&&^^^^
How does the electronic configuration of an element give information about the period and the group it belongs to
Answer:
Electronic configuration of an element gives the information of valence electrons and number of shell present in the element.
Explanation:
Electronic configuration of an element gives the information of valence electrons and number of shell present in the element. We get the information of group number after knowing valence electrons.
The number of shells present in an element is equal to the period number. Thus, by knowing electronic configuration we know the group number and period number of an element, and the position of an element in the periodic table.
An element's electronic configuration, which identifies both its period and group, gives important details regarding its place within the periodic table.
The major energy level (shell) where the outermost electrons are found determines the period. In the electrical arrangement, the period number corresponds to the greatest energy level. The number of valence electrons, which are the electrons at the highest energy level, which are present in an element determines its group or family. Because they have the same valence electron configurations, elements in the same group exhibit comparable chemical characteristics. In conclusion, the electronic configuration helps us comprehend an element's chemical behavior and interactions with other elements by revealing an element's period based on energy levels and its group based on valence electrons.
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Which family of metals is the most reactive?
Rare Earth metals
Transition metals
Alkaline Earth metals
Alkali metals?
Answer:
Alkali metals
Explanation:
Hope you like my answer and my answer helped youGiven six molecules, identify the molecules with polar bonds and the molecules that are polar.CCl4, CH3Cl, H20, CO2, O2
Answer:
polar bonds- H2O, CO2, CH3CL,
The molecules that have polar bonds are CH₃Cl, and H₂O.
What are polar bonds?A polar bond is a type of covalent bond where the electron is unequally distributed.
This unequal distribution is due to the electronegativity difference of the attached atoms in the molecule.
A lewis structure of the molecule is studied to determine whether the compounds are polar and non-polar.
The molecule CCl₄: has one carbon atom at the center and the chlorine surrounds the carbon from all four sides, so even if there is a difference in the electronegativity the net dipole movement gets balanced from all four sides, so it is not a polar bond.
The molecule CH₃Cl
Similar to the CCl₄, hydrogen, and chlorine is surrounding the carbon, the three sides are hydrogen and one side is chlorine, so there is a net dipole movement and so it is a polar bond.
The molecule H₂O: The dipole movement of Hydrogen and oxygen are both in opposite directions and of different magnitude hence it will have a net dipole movement and so it is polar.
The molecule CO₂ and O₂ have net dipole movements as zero so are not polar compounds.
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The rate of a chemical reaction can be found by measuring how ................. the reactants are ................. or how quickly the products are ...............
write on the principle and other application of a named instrument employed in unlocking frozen joints.
We have that the bone file from our research below
The is a very important tool in unlocking frozen joints by using its
Pull stroke
Serrated edges etc
And its also used in the field of dentistry.
Before we pick an instrument to focus on we first have to under stand what a frozen joints is
Frozen Joint,
Frozen Joint, which is also refereed to as adhesive capsulitis, is a situation whereby ones joints are stiff and they experience pain in the joint.
We focus on the
Bone file( principle)
It is made of a pull stroke which is designed to aid the removal of bones,they are also designed with serrated edges which are used in many different ways one of which is to smooth bones out in order to disinfect a given area
Bone file
This can also be used in the field of dentistry.
it puts into use it variant functions to make the work of a dentist easy
In conclusion
The Bone file is a very important tool in unlocking frozen joints by using its
Pull stroke
Serrated edges etc
And its also used in the field of dentistry.
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In what state of matter is carbon dioxide normally found on Earth?
Answer:
Gas
Explanation:
I believe that it is usually a gas on Earth.
what is stoichiometry?
Answer:
the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers.
Explanation:
G o o g l e
Explanation:
Stoichiometry is the calculation of reactants and products in chemical reactions in chemistry.
explain dehydrogenation
Answer:
Dehydrogenation is the process by which hydrogen is removed from an organic compound to form a new chemical (e.g., to convert saturated into unsaturated compounds).
4-hydroxyl and 5- hydroxyl aldehydes exist primarily as a cyclic hemiacetals.draw the structures formed from 4-hydroxyl butanal
Plllsssss hel pls help
which statement correctly contrasts science and psuedoscience
Answer:
The correct answer is Science is objective, whereas pseudoscience is subjective. Pseudoscience includes beliefs, theories, or practices that have been or are considered scientific, but have no basis in scientific fact. This could mean they were disproved scientifically, can't be tested or lack evidence to support them.
Explanation:
hope its help
thank you
Alkanes are chains of carbon atoms surrounded by hydrogen atoms. Which alkane has the weakest dispersion attractive force?
What is the oxygen tank and equipment used for and how is it used??
Answer:
Oxygen tanks are used to store gas for: medical breathing at medical facilities and at home. breathing at altitude in aviation, either in a decompression emergency, or constantly (as in unpressurized aircraft) oxygen first aid kits.
Explanation:
Mark my answer as the brainliest!
Please help thank you (15 points)
Answer:
A. Complete one revolution around the sun
Can someone help me pls, I do not know how to do this. i am trying to help a friend as well
Answer:
Your answer is 5 x 10⁵
I hope it's helps you
Answer:
[tex]thank \: you[/tex]
Iron has a density of 7.86 g/cm3. Calculate the volume (in dL) of a piece of iron having a mass of 4.59 kg .
calculate mass of MnO2 if 1 mole of KMnO4 completely burnt. 2KMnO4 -> K2MnO4+MnO2+O2
Answer: 80 grams
Explanation:
2KMnO4 -> K2MnO4+MnO2+O2
2 moles of KMnO4 would produce 1 mole of MnO2, so 1 mole of KMnO4 would produce 0.5 moles of MnO4. The molar mass of MnO4 is 160 g/mole. 1/2 mole of KMnO4 would therefore be (160 g/mole)*(0.5 moles) = 80 grams.
Rain soaks into the soil or runs off into oceans, rivers, and lakes. ___________ which process is this
Answer:
The water falls to the earth as precipitation, such as rain, hail, sleet, and snow. When precipitation reaches the earth's surface, some of it will flow along the surface of the land and enter surface water like lakes, streams, and rivers, as runoff. The rest of it soaks or percolates into the soil, called
how much energy is contained in 3moles of chlorine
Answer:
1 mol of cl2 contains 71 g
3 mol of cl2 will contain÷
3×71=213 g
Explanation:
There ;3
Answer:
213 g
Explanation:
multiply 3 moles by relative atomic mass of chlorine which is 35.45×2 because its two chlorines and your answer will be 213g
Polymers are long chains of:
A. crystals.
B. molecules.
C. simple molecules
D. atoms
Answer:
The answer should be Molecules.
Explanation:
Polymers are said to be synthetic or natural substances that are formed by joining the monomeric units together by bonds. They are long chains of molecules. Thus, option B is correct.
What are polymers?Polymers are macromolecules that are large and big in size that is composed of multiple chemical units of various molecules linked by chemical bonds. These substances can be natural or man-made.
The polymers are composed of monomeric units that are molecules like the starch polymer made of glucose monomeric units linked by the glycosidic linkages. They are complex and tough structures that often provide structural support and protection.
Proteins, carbohydrates, lipids, and nucleotides are polymers composed of amino acids, sugar, fatty acids, and nucleic acids. Polymers are involved in various functions in living organisms.
Therefore, option B. molecules make long chains of polymers.
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Which of the following is NOT a density formula?
Density = mass/volume
Density = volume/mass
mass = density x volume
volume = mass/density
I need help please Which is the proper conversion factor for converting a mass expressed in pounds (lb) to the same mass expressed in grams (g)?
Answer:
C
Explanation:
There are roughly 454 grams for every pound. The conversion factor would look like this for converting 2 lbs of a sample into grams:
2lbs sample (454g sample/1lb sample) = sample in grams.
Element X forms the ion X22- What is the formula of the covalent compound X forms with chlorine?
A XCI
B XCl2
C XCl3
D XCl4
Answer:
the answer is mostly option a)XCl
Explanation:
9. SI base units used in chemistry include
A. kilograms, liters, inches, and moles.
B. pounds, gallons, moles, and Fahrenheit.
C. kilograms, seconds, moles, and Kelvin.
D. pounds, gallons, moles, and Celsius.
Answer:
C. kilograms, seconds, moles, and Kelvin
Salt water has a density of 1.183g/mL. A ball has a density of 0.0134 g/mL. Will the ball float or sink?
What is the molecular formula of sulphuric acid and ammonia compound by criss cross method
Answer:
H2SO4 AND NH3
Explanation:
I hope it will help you
Answer:
Explanation:
H2SO4 AND NH3
Use VSEPR Theory to predict the molecular geometry around the central atom in each of the following molecules. Which of the following molecular geometries are correct?
1. XeF4, square planar
2. ICI., tetrahedral
3. SF4, seesaw
a. 1 and 2
b. 3 only
c. 1 and 3
d. 2 only
e. 1, 2 and 3
An atom has 30 protons and 30 neutrons. What is its mass number?
Mass number=No of protons+No of neutrons
[tex]\\ \sf\longmapsto Mass\:No=30+30[/tex]
[tex]\\ \sf\longmapsto Mass\:No=60[/tex]
Explanation:
Here,
Protons(p+)=30
Neutrons(N⁰)=30
We know,
Atomic mass(z)=(P+)+(N⁰)
=30+30
=60
Enumerate seven commonly encounter functional group in organic compound
Answer:
-COOH
-CHO
-CO
-NH2
-X(-Cl, -Br, -I)
-RCOOR(R= Alkyl group)
-C6H5