Do the boiling points and melting points of these elements support the claim that elements of the same group have similar physical characteristics?
Answers
Answer:
Elements in the same group has different physical properties such as boiling and melting points. However there are trends of their physical properties down the group.
Explanation:
You should look at the perdoic table to for extra help
The boiling points and melting points of the given elements does not support the claim that elements of the same group have similar physical properties.
What are boiling point and melting point?The boiling point of a substance is the temperature at which it changes from liquid state to gaseous state. Melting point is the temperature at which the substance changes from solid to liquid state.
Elements in the same group shows similar physical and chemical properties. But from the boiling and melting point we cant say that they are in the same group.
Elements in a group shows a trend in boiling point and melting point but cannot be distinguished with this from other groups.
Hence, boiling point and melting point of the elements do no support for the similar properties in a group.
To learn more about groups of elements, refer the link below:
https://brainly.com/question/4418354
#SPJ2
Your question is incomplete, but most probably your full question was,
Do the boiling points and melting points of these elements support the claim that elements of the same group have similar physical characteristics? (image uploaded)
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i think it's a sedimentary rock...
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Explanation: It is an alloy, very probable, not homogeneous.
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Which statement accurately describes the bond that forms between carbon and oxygen to create carbon dioxide
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Answer:
the bond that forms between carbon and oxygen to create carbon dioxide
A polar covalent bond
6. Potential energy can be
transformed into kinetic energy
of force is applied to the object.
True or false?
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Answer:
true
Explanation:
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ANSWER : I AND III
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Which is the Lewis structure for H3PO4?
::
i
H-Ö
0-H
ö
öz-ö-1
H
I
H
H-0–H
ô–P 6
Answers
Answer:
C. H:C:H:H
Explanation:
Follow these simple steps to correctly draw a Lewis dot structure: Add up the total number of valence electrons found in the entire compound. Draw the simple structure (skeleton structure) of the compound by connecting everything with single bonds only. Add electrons to all the noncentral atoms. Put any unused electrons on the central atom.
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atom and what type of ion is it?
Answers
Answer:
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Explanation:
What is the range of valence electrons that metals have?
Answers
An atom is electrically neutral when...
O The number of protons and neutrons are equal.
O The number of protons and electrons are equal.
O The number of neutrons and electrons are equal.
O The neutrons balance the protons and electrons.
Answers
Answer:
The number of protons and electrons are equal.
Explanation:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.
How would the electron configuration of nitrogen change to make a stable configuration?
It would lose four electrons.
It would gain three electrons.
It would gain two electrons.
It would lose five electrons.
Which quantity determines how two atoms bond?
the difference in the number of valence electrons
the difference in their electronegativities
their total number of valence electrons
the sum of their electronegativities
Which statement best explains why the elements in Group 18 do not have electronegativity values?
The elements do not have electrons.
The elements are too large.
The elements have filled valence levels.
The elements have only one electron shell.
Based on patterns in the periodic table, which ion has a stable valence electron configuration?
potassium (K) with a 1+ charge
magnesium (Mg) with a 1− charge
sulfur (S) with a 1− charge
fluorine (F) with a 1+ charge
Which chemical formula represents a polyatomic ion?(1 point)
Na+
Cl–
NaCl
ClO–
Answers
The answers to the questions are as follows;
It would gain three electronsThe difference in their electronegativities.The elements have filled Valence levelspotassium (K) with a 1+ chargeClO-Question 1:
How would the electron configuration of nitrogen change to make a stable configuration?Since Nitrogen has 5 Valence electrons, it needs 3 electrons to attain it's octet configuration. As such, it gains 3 electrons.
Question 2:
Which quantity determines how two atoms bond.The quantity which determines how two atoms bond is The difference in their electronegativities.
Question 3:
Which statement best explains why the elements in Group 18 do not have electronegativity values.This is because the elements have filled Valence levels.
Question 4:
Based on patterns in the periodic table, which ion has a stable valence electron configurationThe ion which has a stable Valence electron configuration is potassium (K) with a 1+ charge
Question 5;
Which chemical formula represents a polyatomic ion?The chemical formula which represents a polyatomic ion is; ClO-
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Answer:
What are you a 6 yo? Anyways, the most common properties are, They are good conductors of electricity, They are lustrous and They are sonorous.
negative ions form when atoms _______ valence electrons.
Answers
Answer:
Negatively charged ions are called anions, and an anion is formed when an atom gains an electron. Thus, the atom has an extra charge of electrons,
Explanation:
so it becomes negatively charged.
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Electrons have a negative charge so if an atom is getting more of them, it's becoming more negative.
Which unit could be used to measure volume?
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Answer:
A
Explanation:
Because it milliliter and litre is used to measure volume not meter or millimeter
Select the correct answer.
Which is true with respect to the kinetic energy of a molecule?
ОА.
it is the lowest at low temperatures
OB.
it increases at low temperatures
Oc it is the same at all temperatures
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Answers
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Answer:
Dmitri Mendeleev
Explanation:
Which material is a heterogeneous mixture?
O A. A brass coin
B. Tap water
C. Vinegar
D. Soil
Answers
Answer:
D
Explanation:
Heterogeneous mixture is a mixture of non-uniform composition & in which the components can be easily identified
Answer:
Soil
Explanation:
Soil is made up of many things (therefore it's not pure) and does not appear to be uniform; it does not look the same throughout. Therefore it is heterogeneous.
Is it _________
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A.Unsafe, lunar
B.Safe, solar
C.Unsafe, solar
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Answer:
unsafe, solar
Explanation:
A lunar eclipse covers the moon which is safe to look at. New Moon, again is simply the moon. However, we should never look at the sun, eclipsed or not!
Answer:
C, it is unsafe to view solar
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The atomic number equals blank of blank electrons
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Answer:
The atomic number equals number of protons and electrons
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How do animals and plants rely on each other in the prairie? ITS TIMED
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Second-order consumers eat the grass as their food source.
The grass in the prairie provides oxygen, while animals give off carbon dioxide gas.
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Answer:
I would assume its the last one "The grass in the prairie provides oxygen, while animals give off carbon dioxide gas."
Explanation:
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B.solution
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Answers
Answer:
d. compound
Explanation:
compound and elements are pure substances
Balance equations practice
Answers
Answer:
1 - B) 2 - B) 3 - A)
Explanation:
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B) 4
C) 5
D) 6
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B) 2
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B) 4
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what type of reaction mechanism is operative in the conversion of 2-methyl-2-butanol into 2-chloro-2-methylbutane?
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Answer:
Below
Explanation:
The reaction is a Substitution SN1 mechanism
The period of the vibrating string is 0.004 seconds. What is the frequency of the
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Answer:4
Explanation:
Use the following image to answer the following questions. A student was performing an experiment using two identical cups made of styrofoam. The student had Cup A holding water at 90℃ and Cup B holding water at 20℃. The student then put an Aluminum Bar into each cup that was touching the water. As time passed, the student noticed that the temperature of the water in Cup A and Cup B began to change. Question:
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Answer:
The water will eventually become the same temature (A)
A student wants to calculate the heat gained of 100 grams of water in order to
calculate the specific heat of a metal in the following problem. The water is
heated from 25C to 50C when the metal is added. The specific heat of water is
4.18 J/gºC. Use Q=m xCxT*
Answers
The quantity of heat gained to raise the temperature from 25.0°C to 50.0°C is 10,450 Joules.
Given the following data:
Mass of water = 100 gramsInitial temperature = 25.0°CFinal temperature of water = 50.0°CSpecific heat capacity of water = 4.18 J/g°CTo find the quantity of heat gained:
Mathematically, heat capacity or quantity of heat is given by the formula;
[tex]Q = mc\theta[/tex]
Where:
Q represents the heat capacity or quantity of heat.m represents the mass of an object.c represents the specific heat capacity.∅ represents the change in temperature.Substituting the values into the formula, we have:
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Read that From picture and tell me the answer please
Answers
Answer:
1g Hydrogen
Explanation:
Getting to the equation:Calcium in water reacts vigorously to give a cloudy white Precipitate (compound) called Calcium hydroxide alongwith the evolution of Hydrogen gas.
[tex] \boxed{ \mathsf{Ca + H_2O \rightarrow Ca(OH)_2 + H_2}}[/tex]
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Balancing the equation:This reaction is not in it's balanced form! The number of atoms of Hydrogen on the left is 2 while that on the right is 4,I.e.,they're not equal.
Adding a 2 in front of H2O solves the problem by making the number of atoms of each element on both the sides equal.
[tex] \mathsf{Ca +2 H_2O \rightarrow Ca(OH)_2 + H_2}[/tex]
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Observations:Looking into the equation more carefully, we see:
1 atom of Calcium reacts with 2 molecules of water to give 1 molecule of Calcium Hydroxide alongwith 1 molecule of Hydrogen gas.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gram atomic and molecular massesMass of one atom of Calcium = it's gram atomic mass
= 40 g
Mass of one "molecule" of Hydrogen
= it's Gram molecular mass
= gram mass of one atom × number of atoms in one molecule
= 1 × 2
= 2 g
So,
according to our observation:
One atoms of Calcium gives one molecule of Hydrogen (during the particular reaction)
=> 40g of Calcium gives = 2g of Hydrogen
•°• 1 g of Calcium gives = [tex] \frac{2}{40} [/tex]
= [tex] \frac{1}{20} [/tex] g Hydrogen
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Answer:We're provided with 20g of Calcium,
=> 20g of Calcium gives = 20 × [tex] \frac{1}{20} [/tex] g H2
= 1 g H2
_______________
Hope this helps!
help plssssssssssssssss??
Answers
Answer:
Chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form.
Explanation:
Chemical change involves formation of new substances. Therefore, the correct answer is "Chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form."
Some substances like chalk, duster, paper, wood, air are not found in the periodic table. why?
Answers
Answer:
They are not pure elements, instead they are compounds, hence why they are not found on the periodic table. (Periodic table only consists of pure elements)
What would cause a liquid to turn into a solid?
Answers
Answer:
Freezing the liquid
Explanation:
Freezing a liquid causes a liquid to become a soild.
Answer:
changing the temperature of the liquid
Explanation:
Ex. Cooking brownie batter(liquid), turns it into an edible brownie(solid). Ex. Putting water into a freezer freezes it, turning it into a solid.